Download App

Science [1 Marks Each] M.C.Q.

Water · Rajasthan Board (RBSE) STD 6 (Rajasthan - English Medium). 159 questions.

Questions

[1 Marks Each] M.C.Q.

Take a timed test

159 questions · auto-graded multiple-choice test.

MCQ 11 Mark
Clouds are:
  • A
    Water vapours as such.
  • B
    Water vapours condensed to tiny droplets of water.
  • ✓
    Tiny droplets of water and dust particles.
  • D
    All of the above.
Answer
Correct option: C.
Tiny droplets of water and dust particles.
Tiny droplets of water and dust particles.
View full question & answer→
MCQ 21 Mark
DIRECTIONS: Read the passage (s) given below and answer the questions that/ allow Passage - Apart from drinking, there are so many activities for which we use water. Most of the water is in oceans and seas. We draw drinking water from taps which is further drawn from a well or a lake etc. We need water for which of the following?
  • A
    Baking.
  • B
    Brushing.
  • C
    Cooking.
  • ✓
    All of these.
Answer
Correct option: D.
All of these.
All of these.
View full question & answer→
MCQ 31 Mark
When you see clouds forming in the sky, the water above you is forming droplets in what stage of the water cycle?
  • A
    Collection
  • B
    Evaporation
  • ✓
    Condensation
  • D
    Precipitation
Answer
Correct option: C.
Condensation
Clouds are formed because of condensation.
View full question & answer→
MCQ 41 Mark
We cannot use seawater because:
  • ✓
    Sea water is salty.
  • B
    Sea water is polluted.
  • C
    Of high cost.
  • D
    Sea water cannot be transported.
Answer
Correct option: A.
Sea water is salty.
Sea water is salty.
View full question & answer→
MCQ 51 Mark
A cloud is unable to hold droplets of water because:
  • ✓
    They become heavier.
  • B
    They become lighter.
  • C
    They undergo condensation slowly.
  • D
    They undergo sublimation.
Answer
Correct option: A.
They become heavier.
In a cloud, the size of the droplets of water increases. They become heavier and fall as rain.
View full question & answer→
MCQ 61 Mark
The basic idea behind rain water harvesting is:
  • A
    To harvest water.
  • B
    To harvest crops.
  • ✓
    To catch water where it falls.
  • D
    All of the above.
Answer
Correct option: C.
To catch water where it falls.
To catch water where it falls.
View full question & answer→
MCQ 71 Mark
Why is mineral water better than distilled water for drinking?
  • A
    Mineral water is cheap.
  • B
    Mineral water is easily available.
  • ✓
    Mineral water contains dissolved salts.
  • D
    Mineral water is colorful.
Answer
Correct option: C.
Mineral water contains dissolved salts.
Mineral water contains dissolved salts and it is preferred over distilled water for drinking.
View full question & answer→
MCQ 81 Mark
Rain water harvesting refers to:
  • A
    A method of collecting rain water for our immediate daily use.
  • B
    A method of conservation of rains.
  • ✓
    Collecting rain water for later use.
  • D
    All of the above.
Answer
Correct option: C.
Collecting rain water for later use.
Collecting rain water for later use.
View full question & answer→
MCQ 91 Mark
What do we see on the surface of glass containing ice-chilled water?
  • A
    Dust
  • ✓
    Water droplets
  • C
    Water vapour
  • D
    Ice
Answer
Correct option: B.
Water droplets
Water droplets collect on the outer surface of glass containing ice - chilled water due condensation of water vapour present in the atmosphere.
View full question & answer→
MCQ 101 Mark
DIRECTIONS: Read the passage (s) given below and answer the questions that/ allow Passage - Apart from drinking, there are so many activities for which we use water. Most of the water is in oceans and seas. We draw drinking water from taps which is further drawn from a well or a lake etc. Choose the correct option?
  • A
    All of us i'. e., Indians) get drinking water from taps.
  • ✓
    The water that we get from taps is also drawn from a lake, or a river or a well.
  • C
    Both the above.
  • D
    None of these.
Answer
Correct option: B.
The water that we get from taps is also drawn from a lake, or a river or a well.
The water that we get from taps is also drawn from a lake, or a river or a well.
View full question & answer→
MCQ 111 Mark
Evaporation of sea water:
  • A
    Takes place during day time.
  • B
    Takes place during night time.
  • ✓
    Takes place throughout day and night.
  • D
    Takes place only during noon.
Answer
Correct option: C.
Takes place throughout day and night.
Takes place throughout day and night.
View full question & answer→
MCQ 121 Mark
Why is water useful to life on the earth?
  1. It maintains ecological balance.
  2. It sustains life.
  3. It is necessary for respiration in aquatic organisms.
  • A
    Only $(i)$ and $(ii).$
  • B
    Only $(ii)$ and $(iii)$.
  • C
    Only $(i)$ and $(iii).$
  • ✓
    $(i), (ii)$ and $(iii).$
Answer
Correct option: D.
$(i), (ii)$ and $(iii).$

Water is useful to life on the earth. To maintain ecological balance, for sustaining life and it is also necessary for respiration in aquatic organisms.

View full question & answer→
MCQ 131 Mark
Which of the following combines with water vapour or rain water to form acid rain?
  • A
    Dust.
  • B
    Carbon particles.
  • C
    Oxygen.
  • ✓
    Sulphur dioxide.
Answer
Correct option: D.
Sulphur dioxide.
Sulphur dioxide in the air combines with water vapour in the atmosphere or rain water to form acid rain i.e., sulphurous acid or sulphuric acid respectively.
View full question & answer→
MCQ 141 Mark
Rain water harvesting is a method employed to:
  • A
    Stop soil erosion in a place.
  • ✓
    Raise the water table of a place.
  • C
    Decrease drought at a place.
  • D
    Decrease floods at a place.
Answer
Correct option: B.
Raise the water table of a place.
Rain water is collected in a special type of arrangement. This water is used which in turn helps to raise the water table of a place.
View full question & answer→
MCQ 151 Mark
Purest form of natural water is _________.
  • A
    Seawater.
  • B
    Groundwater.
  • ✓
    Rainwater.
  • D
    Surface water.
Answer
Correct option: C.
Rainwater.
Rainwater.
View full question & answer→
MCQ 161 Mark
The actual source of tap water, supplied by municipal corporation is:
  • A
    River.
  • B
    Lake.
  • C
    Well.
  • ✓
    All of these.
Answer
Correct option: D.
All of these.
The actual source of tap water is also a river, lake or well.
View full question & answer→
MCQ 171 Mark
There are.......... stage of water cycle.
  • A
    $2$
  • B
    $3$
  • ✓
    $4$
  • D
    $6$
Answer
Correct option: C.
$4$

The stages are evaporation, condensation precipitation and collection.

View full question & answer→
MCQ 181 Mark
DIRECTIONS: Read the passage (s) given below and answer the questions that/ allow Passage - If we put some water in a plate and allow the plate to lie in open in sunlight we find that the water from the plate disappears. Moreover even if we keep the plate in shade the water still disappears. The process by which the water disappears from the plate is
  • ✓
    Evaporation.
  • B
    Condensation.
  • C
    Transpiration.
  • D
    Precipitation.
Answer
Correct option: A.
Evaporation.
Evaporation.
View full question & answer→
MCQ 191 Mark
The water cycle is the Earth's way of:
  • A
    Getting rid of water.
  • ✓
    Recycling water.
  • C
    Using up all of our water.
  • D
    Cleaning our water.
Answer
Correct option: B.
Recycling water.
Water cycle is the cyclic movement of water from the atmosphere to the earth and back to the atmosphere through various processes.
View full question & answer→
MCQ 201 Mark
DIRECTIONS: Match Column$-I$ with Column$-II$ and select the correct answer using the codes given below the columns.
S.No.
Column-$I$
S.No.
Column-$II$
$A$
Water cycle.
$(p)$
Solid state of water.
$B$
Hail, snow.
$(q)$
Condensation.
$C$
Water vapour changes to liquid water.
$(r)$
Circulation of water between ocean and land.
$D$
Water enters air.
$(s)$
Transpiration.
  • A
    $A\rightarrow (p); B\rightarrow (q); C\rightarrow (r); D\rightarrow (s).$
  • B
    $A\rightarrow (q); B\rightarrow (r); C\rightarrow (s); D\rightarrow (p).$
  • ✓
    $A\rightarrow (r); B\rightarrow (p); C\rightarrow (q); D\rightarrow (s).$
  • D
    $A\rightarrow (s); B\rightarrow (q); C\rightarrow (p); D\rightarrow (r).$
Answer
Correct option: C.
$A\rightarrow (r); B\rightarrow (p); C\rightarrow (q); D\rightarrow (s).$
$A\rightarrow (r); B\rightarrow (p); C\rightarrow (q); D\rightarrow (s).$
View full question & answer→
MCQ 211 Mark
Observe the figure given below and identify the process.
  • A
    Water cycle.
  • B
    Water purification.
  • C
    Water condensation.
  • ✓
    Rain water harvesting.
Answer
Correct option: D.
Rain water harvesting.
Rain water harvesting is a process of collection of rainwater in cemented pits. The rainwater so collected can be stored under the ground and used for various purposes in future.
View full question & answer→
MCQ 221 Mark
Aquatic animals and plants:
  • A
    Have special organs that store oxygen.
  • B
    Have to come out of water to breathe.
  • ✓
    Use the oxygen dissolved in water for respiration.
  • D
    Use oxygen present in the air.
Answer
Correct option: C.
Use the oxygen dissolved in water for respiration.
Aquatic animals and plants use the oxygen dissolved in water for respiration.
View full question & answer→
MCQ 231 Mark
Why is the presence of water vapours in air important?
  • A
    It is important for air to be moist.
  • ✓
    It is important for water cycle in nature.
  • C
    It is important as plant get their water from this source.
  • D
    None of these.
Answer
Correct option: B.
It is important for water cycle in nature.
It is important for water cycle in nature.
View full question & answer→
MCQ 241 Mark
Which type of rainfall would be most helpful to farmers?
  • ✓
    Rainfall that evaporates quickly
  • B
    Rainfall that runs off the land quickly
  • C
    Rainfall that soaks into the soil slowly
  • D
    Very little rainfall
Answer
Correct option: A.
Rainfall that evaporates quickly
Rainfall that soaks into the soil slowly is most helpful to fanners.
View full question & answer→
MCQ 251 Mark
A girl saw a water puddle while going to school. In the evening, while returning home, she observed that the puddle disappeared. This was because:
  • A
    The water evaporated.
  • B
    The water seeped into the ground.
  • C
    The water condensed.
  • ✓
    Both $(a)$ and $(b).$
Answer
Correct option: D.
Both $(a)$ and $(b).$

 The puddle disappeared by evening, because of evaporation and the seepage of water into the ground.

View full question & answer→
MCQ 261 Mark
Water vapours enter the air (or atmosphere) by which of the following processes?
  • A
    Evaporation of ocean water.
  • B
    Transpiration occurring in plants.
  • C
    By evaporation of sweat of animals.
  • ✓
    All of the above.
Answer
Correct option: D.
All of the above.
All of the above.
View full question & answer→
MCQ 271 Mark
Which of the following are changed when water boils?
  1. Temperature.
  2. State.
  3. Colour.
  • ✓
    Only $(i)$ and $(ii).$
  • B
    Only $(ii)$ and $(iii).$
  • C
    Only $(i)$ and $(iii).$
  • D
    $(i), (ii)$ and $(iii)$.
Answer
Correct option: A.
Only $(i)$ and $(ii).$

When water boils, there will be a change in its temperature and state.

View full question & answer→
MCQ 281 Mark
DIRECTIONS: Read the passage (s) given below and answer the questions that/ allow Passage - Only a small fraction of water available on the earth is fit for use of plants, animals and humans. The total amount of water on earth remains the same, but the water available for use is very limited and is decreasing with over usage. How is it that total amount of water on earth remains same though it is consumed by us forvario us activities on a large scale?
  • ✓
    Because of water cycle.
  • B
    Because of transpiration.
  • C
    Because of condensation.
  • D
    Because of water harvesting.
Answer
Correct option: A.
Because of water cycle.
Because of water cycle.
View full question & answer→
MCQ 291 Mark
Cloud seeding is a technique that induces rain. What does the process involve?
  • A
    Adopting an agricultural practice that depends on clouds.
  • ✓
    Introducing particles in clouds to facilitate condensation.
  • C
    Making clouds and placing them in the sky.
  • D
    Scattering clouds to form seed like structures.
Answer
Correct option: B.
Introducing particles in clouds to facilitate condensation.
Cloud seeding is an artificial method of introducing particles in clouds to cause rains by initiating condensation of water vapour present in the clouds.
View full question & answer→
MCQ 311 Mark
In a small town, the number of water pumps, concrete houses and roads increased. What happens to the water table of that place?
  • ✓
    It becomes lower.
  • B
    It becomes higher.
  • C
    It remains unaffected.
  • D
    It first becomes lower and then higher.
Answer
Correct option: A.
It becomes lower.
It becomes lower.
View full question & answer→
MCQ 321 Mark
Where does condensation occur in the water cycle?
  • ✓
    When cloud is forming.
  • B
    When ocean water changes into water vapour.
  • C
    When water flowing down a river.
  • D
    When underground water soaking into rocks and soil.
Answer
Correct option: A.
When cloud is forming.
Clouds are the condensed form of water vapour,
View full question & answer→
MCQ 331 Mark
Water is available on the surface of earth in the form of oceans, seas, rivers, ponds, etc. Approximately how much of the earth is covered with water?
  • A
    $\frac13$ part.
  • ✓
    $\frac23$ part.
  • C
    $\frac12$ part.
  • D
    $\frac14$ part.
Answer
Correct option: B.
$\frac23$ part.

Abut $\frac23$ part of earth is covered with water.

View full question & answer→
MCQ 341 Mark
Temporary hardness of water is due to the presence of:
  • ✓
    Calcium bicarbonate.
  • B
    Sodium carbonate.
  • C
    Potassium carbonate.
  • D
    Magnesium hydride.
Answer
Correct option: A.
Calcium bicarbonate.
The temporary hardness of water is due to the presence of bicarbonates of calcium and magnesium dissolved in it.
View full question & answer→
MCQ 351 Mark
In which of the following activities will you use minimum amount of water?
  • A
    Bathing.
  • ✓
    Brushing teeth.
  • C
    Washing clothes.
  • D
    Mopping a room.
Answer
Correct option: B.
Brushing teeth.
In brushing teeth we use minimum amount of water.
View full question & answer→
MCQ 361 Mark
Water in our tap comes from a:
  • A
    River.
  • B
    Lake.
  • C
    Well.
  • ✓
    River, lake or well.
Answer
Correct option: D.
River, lake or well.
Water in our tap comes from river, lake or well.
View full question & answer→
MCQ 371 Mark
DIRECTIONS: Match Column$-I$ with Column$-II$ and select the correct answer using the codes given below the columns.
S.No.
Column-$I$
S.No.
Column-$II$
$A$
Ground water
$(p)$
Excess rains.
$B$
Ocean
$(q)$
Aquifers.
$C$
Clouds
$(r)$
Water containing dissolved salts.
$D$
Floods
$(s)$
Water vapour and dirt.
  • A
    $A \rightarrow (p); B \rightarrow (q); C \rightarrow (r); D \rightarrow (s).$
  • ✓
    $A \rightarrow (q); B \rightarrow (r); C \rightarrow (s); D \rightarrow (p).$
  • C
    $A \rightarrow (r); B \rightarrow (s); C \rightarrow (p); D \rightarrow (q).$
  • D
    $A \rightarrow (s); B \rightarrow (p); C \rightarrow (q); D \rightarrow (r).$
Answer
Correct option: B.
$A \rightarrow (q); B \rightarrow (r); C \rightarrow (s); D \rightarrow (p).$
$A \rightarrow (q); B \rightarrow (r); C \rightarrow (s); D \rightarrow (p).$
View full question & answer→
MCQ 381 Mark
In water cycle we studied that water enters in air by some processes. If we say that water vapours that enter the air by process $'A?$ and by $'B',$ gets converted into water droplets which of the following correctly identifies $'A$ and $'B?$
  • A
    $A =$ evaporation $B =$ process of change of water vapours into liquid.
  • B
    $A =$ The process involved in the disappearance of water from plate kept in sunlight, $B =$ The process by which a wheat plant loses water to the atmosphere.
  • C
    $A =$ The process by which forest plants lose water to the atmosphere $B =$ The process involved in the conversion of water vapours to liquid water.
  • ✓
    $(a)$ and $(c)$ are correct.
Answer
Correct option: D.
$(a)$ and $(c)$ are correct.

$A =$ Evaporation or transpiration, $B =$ Condensation.

View full question & answer→
MCQ 391 Mark
Ocean water is highly salt is hand unfit for drinking purposes.
  • A
    Oceans play no role in supply of usable water.
  • ✓
    Role of oceans in supply of usable water is quite important.
  • C
    Both the above.
  • D
    None of these.
Answer
Correct option: B.
Role of oceans in supply of usable water is quite important.
Role of oceans in supply of usable water is quite important.
View full question & answer→
MCQ 401 Mark
Why does the water table of a place become lower?
  • A
    When trees are planted.
  • ✓
    When there is a drought.
  • C
    When there is a cyclone and flood.
  • D
    All of the above.
Answer
Correct option: B.
When there is a drought.
The water table of a place where droughts prolong for a long period of time becomes lower because of lesser water seeping into the ground.
View full question & answer→
MCQ 411 Mark
Which of the following is potable water?
  • ✓
    A glass of water fit for drinking.
  • B
    Water in a pot.
  • C
    Sea water.
  • D
    Water with bacteria and chemicals.
Answer
Correct option: A.
A glass of water fit for drinking.
Water which is fit for drinking is called potable water.
View full question & answer→
MCQ 421 Mark
Plants release large amount of water vapour into the atmosphere by the process called:
  • A
    Evaporation
  • B
    Condensation
  • C
    Precipitation
  • ✓
    Transpiration
Answer
Correct option: D.
Transpiration
Plants release large amount of water vapour into the atmosphere by the process called transpiration.
View full question & answer→
MCQ 431 Mark
The process of collecting rain water in huge, cemented pits is called:
  • A
    Storing of water.
  • B
    Filtration of water.
  • C
    Transportation of water.
  • ✓
    Rain water harvesting.
Answer
Correct option: D.
Rain water harvesting.
The process of collecting rain water in huge cemented pits is called rain water harvesting.
View full question & answer→
MCQ 441 Mark
Which natural disaster causes famine?
  • A
    Flood.
  • B
    Earthquake.
  • ✓
    Drought.
  • D
    All of these.
Answer
Correct option: C.
Drought.
Drought.
View full question & answer→
MCQ 451 Mark
Which of the following substances contain water?
  1. Milk.
  2. Blood.
  3. Oil.
  4. Fruits.
  • ✓
    Only $(i), (ii)$ and $(iv).$
  • B
    Only $(i),(ii)$ and $(iii).$
  • C
    Only $(ii), (iii)$ and $(iv).$
  • D
    Only $(i), (iii)$ and $(iv).$
Answer
Correct option: A.
Only $(i), (ii)$ and $(iv).$

Water is present in a large amount in natural substances like milk, blood and fruits.

View full question & answer→
MCQ 461 Mark
Which of the following will be an advantage of inter-linking rivers in India?
  • A
    Lot of people will gain employment.
  • B
    Floods will take place uniformly throughout the country.
  • ✓
    Water will be distributed uniformly.
  • D
    India will become a technically advanced country.
Answer
Correct option: C.
Water will be distributed uniformly.
The advantage of inter-linking all the rivers in India is to facilitate uniform distribution of water.
View full question & answer→
MCQ 471 Mark
Which of the following processes help in transfer of water to air?
  • A
    Evaporation.
  • B
    Condensation.
  • C
    Transpiration.
  • ✓
    Both $(a)$ and $(c).$
Answer
Correct option: D.
Both $(a)$ and $(c).$
Both $(a)$ and $(c).$
View full question & answer→
MCQ 481 Mark
Which one is the purest form of water?
  • A
    River water
  • B
    Groundwater
  • ✓
    Rainwater
  • D
    Ocean water
Answer
Correct option: C.
Rainwater
Rainwater
View full question & answer→
MCQ 491 Mark
Water is:
  • A
    An element.
  • ✓
    A compound.
  • C
    A mixture.
  • D
    Both $(a)$ and $(c).$
Answer
Correct option: B.
A compound.

Water is a compound because it is made up of a single type of molecules which have two different types of atoms hydrogen and oxygen.

View full question & answer→
MCQ 501 Mark
What percentage of water is readily available to us?
  • ✓
    $3\%.$
  • B
    $97\%.$
  • C
    $60\%.$
  • D
    $40\%.$
Answer
Correct option: A.
$3\%.$
$3\%.$
View full question & answer→
MCQ 511 Mark
What is the main source of water for inland lakes?
  • A
    Snow.
  • B
    Sea water.
  • ✓
    Ground water.
  • D
    Springs.
Answer
Correct option: C.
Ground water.
The inland lakes depend on rains or the water table (ground water).
View full question & answer→
MCQ 521 Mark
Evaporation involves:
  • A
    Change of solid to vapour.
  • ✓
    Change of liquid to vapour.
  • C
    Change of solid to liquid.
  • D
    Change of vapour to liquid.
Answer
Correct option: B.
Change of liquid to vapour.
Change of liquid to vapour.
View full question & answer→
MCQ 531 Mark
Cloud forms through the process of:
  • ✓
    Condensation
  • B
    Precipitation
  • C
    Freezing
  • D
    Transpiration
Answer
Correct option: A.
Condensation
Water vapour condenses on dust particles present in atmosphere to form tiny droplets of water which float in air and known as cloud.
View full question & answer→
MCQ 541 Mark
If there are no rains at a place for a long time it results in:
  • A
    Floods.
  • ✓
    Drought.
  • C
    Either floods or drought.
  • D
    None of these.
Answer
Correct option: B.
Drought.
Drought.
View full question & answer→
MCQ 551 Mark
The sea water changes to water vapour:
  • A
    By solar energy.
  • B
    By heat of sun.
  • ✓
    Both the above.
  • D
    None of these.
Answer
Correct option: C.
Both the above.
Heat energy of sun is same as solar energy.
View full question & answer→
MCQ 561 Mark
Potable water is:
  • A
    Ocean water.
  • ✓
    Groundwater at selected places.
  • C
    River water.
  • D
    Ponds water.
Answer
Correct option: B.
Groundwater at selected places.
Groundwater at selected places.
View full question & answer→
MCQ 571 Mark
DIRECTIONS: Read the passage $(s)$ given below and answer the questions that/ allow Passage - Only a small fraction of water available on the earth is fit for use of plants, animals and humans. The total amount of water on earth remains the same, but the water available for use is very limited and is decreasing with over usage. We have a lot of water in oceans, then how is it said that the amount of usable water is limited?
  • A
    Sea water is not fit for all our uses.
  • B
    Sea water can not be used directly by us for drinking.
  • C
    Sea water can not be used directly for plant production.
  • ✓
    All of the above.
Answer
Correct option: D.
All of the above.
All of the above.
View full question & answer→
MCQ 581 Mark
Which of the following statements is true?
  • A
    The salinity of sea increases tremendously in a short time.
  • B
    The salinity of rivers decreases with time.
  • ✓
    The salinity of seas increases with time.
  • D
    The salinity of seas remains constant with time.
Answer
Correct option: C.
The salinity of seas increases with time.
A lot of salt deposits are present in our earth's crust. They are carried by rain water in dissolved form and increase the salinity of seas slowly over the time.
View full question & answer→
MCQ 591 Mark
Floods occur:
  • ✓
    In those areas where it rains excessively.
  • B
    In those areas where we have constructed large dams.
  • C
    Both the above.
  • D
    None of these.
Answer
Correct option: A.
In those areas where it rains excessively.
In those areas where it rains excessively.
View full question & answer→
MCQ 601 Mark
Observe the given figure.

Which of the following processes is responsible for the formation of water droplets outside the glass?
  • A
    Evaporation.
  • B
    Cooling.
  • ✓
    Condensation.
  • D
    Transpiration.
Answer
Correct option: C.
Condensation.
The condensation of water vapour is responsible for the formation of water droplets on the outer surface of the glass.
View full question & answer→
MCQ 611 Mark
In water cycle the process that takes place before rains is called:
  • A
    Evaporation.
  • ✓
    Condensation.
  • C
    Precipitation.
  • D
    Melting.
Answer
Correct option: B.
Condensation.
Condensation.
View full question & answer→
MCQ 621 Mark
Which of the following is the primary source of water on land?
  • A
    Lakes.
  • B
    Tanks.
  • C
    Ponds.
  • ✓
    Rain water.
Answer
Correct option: D.
Rain water.
Rain water forms the primary source of water on the land.
View full question & answer→
MCQ 631 Mark
Clouds are formed due to:
  • A
    Only evaporation.
  • B
    Only condensation.
  • ✓
    Both evaporation and condensation.
  • D
    Only vaporization.
Answer
Correct option: C.
Both evaporation and condensation.
Clouds are formed due to evaporation and condensation.
View full question & answer→
MCQ 641 Mark
Transpiration is a process in which plants:
  • A
    Receive water from soil.
  • B
    Absorb water vapour from air.
  • C
    Prepare food from water.
  • ✓
    Release water vapour.
Answer
Correct option: D.
Release water vapour.
Transpiration is a process in which there is loss of water from plants as water vapour through the pores of their leaves.
View full question & answer→
MCQ 651 Mark
In thunderstorm, the charges accumulate near the upper edges of clouds are. ......
  • A
    Negatively charged
  • ✓
    Positively charged
  • C
    Neutral
  • D
    None of these
Answer
Correct option: B.
Positively charged
Positively charged
View full question & answer→
MCQ 661 Mark
The tap water is considered pure and fit for drinking. Pure water is tasteless but tap water has some taste. This taste in tap water is due to:
  • ✓
    Chemical treatment through which the water has to pass before its supply through taps.
  • B
    Certain gases and salts dissolved in water that is supplied as tap water.
  • C
    Both $(a)$ and $(b).$
  • D
    None of these.
Answer
Correct option: A.
Chemical treatment through which the water has to pass before its supply through taps.
Chemical treatment through which the water has to pass before its supply through taps.
View full question & answer→
MCQ 671 Mark
Which of these is an example of liquid water?
  • A
    Frost
  • ✓
    Rain
  • C
    Ice
  • D
    Steam
Answer
Correct option: B.
Rain
Liquid form of water is rain.
View full question & answer→
MCQ 681 Mark
A Observe the figure given below and identify the process.
  • ✓
    Water cycle.
  • B
    Torrential rain causing floods.
  • C
    Soil erosion.
  • D
    Rain water harvesting.
Answer
Correct option: A.
Water cycle.
The process of water cycle is shown in the given figure.
View full question & answer→
MCQ 691 Mark
Identify the process represented by the part 'A? of the diagram.
  • A
    Evaporation.
  • B
    Transpiration.
  • ✓
    Condensation.
  • D
    None of these.
Answer
Correct option: C.
Condensation.
In cloud formation water vapours change into small droplets of water.
View full question & answer→
MCQ 701 Mark
Which of the following activity does not involve use of water?
  • A
    Washing clothes.
  • B
    Bathing.
  • C
    Cleaning utensils.
  • ✓
    Drying wet clothes.
Answer
Correct option: D.
Drying wet clothes.
Drying wet clothes is an activity which does not involve use of water.
View full question & answer→
MCQ 711 Mark
Which of the following will cause a decrease in the water table at a place in future?
  • ✓
    Lack of rain water harvesting infrastructure.
  • B
    Emmigration.
  • C
    Cloud seeding.
  • D
    Growing trees.
Answer
Correct option: A.
Lack of rain water harvesting infrastructure.
Lack of rain water harvesting infrastructure i.e., underground cemented pits decreases water table at a place.
View full question & answer→
MCQ 721 Mark
Liquid water changes to water vapour by the process of:
  • ✓
    Evaporation
  • B
    Condensation
  • C
    Precipitation
  • D
    Freezing
Answer
Correct option: A.
Evaporation
Evaporation is the process in which water changes into water vapour.
View full question & answer→
MCQ 731 Mark
You can expect the most evaporation from the surface of a pond in:
  • A
    Cold rainy day
  • B
    Cold sunny day
  • C
    Warm rainy day
  • ✓
    Warm sunny day
Answer
Correct option: D.
Warm sunny day
Warm sunny day
View full question & answer→
MCQ 741 Mark
Clouds are formed:
  • A
    When water vapours present in air get cooled and change into tiny liquid droplets.
  • B
    By the process of evaporation of water vapours.
  • C
    By the process of condensation of water vapours.
  • ✓
    Both $(a)$ and $(c)$ are correct.
Answer
Correct option: D.
Both $(a)$ and $(c)$ are correct.
Both $(a)$ and $(c)$ are correct.
View full question & answer→
MCQ 751 Mark
Which of the following causes water to change from one state to another?
  • A
    Pressur.
  • B
    Concentration.
  • ✓
    Temperature.
  • D
    Volume.
Answer
Correct option: C.
Temperature.

Temperature plays an important role in the inter-conversion of water from liquid to solid-ice and gaseous state, steam.

View full question & answer→
MCQ 761 Mark
Which of the following statement(s) is/ are true? $(i)$ Rainwater contains dissolved gases. $(ii)$ Sea water contains dissolved salts.
  • ✓
    Both $(i)$ and $(ii)$ are true.
  • B
    Only $(i)$ is true.
  • C
    Only $(ii)$ is true.
  • D
    None of these.
Answer
Correct option: A.
Both $(i)$ and $(ii)$ are true.
Both $(i)$ and $(ii)$ are true.
View full question & answer→
MCQ 771 Mark
What causes the formation of salt from sea water?
  • ✓
    Evaporation.
  • B
    Condensation.
  • C
    Transpiration.
  • D
    Transformation.
Answer
Correct option: A.
Evaporation.
Sea water contains a lot of dissolved salts and when the evaporation of the sea water occurs, these salts are left behind.
View full question & answer→
MCQ 781 Mark
In early winter mornings, we can see drops of water on the grass. This is because of:
  • A
    Photosynthesis.
  • B
    Transpiration.
  • ✓
    Condensation.
  • D
    Water cycle.
Answer
Correct option: C.
Condensation.
Due to the sunrays, the water vapour present in the atmosphere condenses to form dew drops which fall on the blades of grass, leaves of plants etc., during early winter mornings.
View full question & answer→
MCQ 791 Mark
“Catch water where it falls” is the basic idea behind:
  • A
    Recycling of water.
  • B
    Making dams to store water.
  • ✓
    Rain water harvesting.
  • D
    Condensation of water vapour.
Answer
Correct option: C.
Rain water harvesting.
‘Catch water where it falls’ is the basic idea behind rainwater harvesting.
View full question & answer→
MCQ 801 Mark
During lightning which of the following is a safe place?
  • A
    Open field
  • ✓
    Inside a house
  • C
    Bus stop
  • D
    Elevated ridge
Answer
Correct option: B.
Inside a house
View full question & answer→
MCQ 811 Mark
The quantity of water required to produce one page of your book is:
  • A
    One bucket.
  • B
    Ten buckets.
  • ✓
    Two glasses.
  • D
    Few drops.
Answer
Correct option: C.
Two glasses.
View full question & answer→
MCQ 821 Mark
Which one is a process in which water changes into vapours in atmosphere?
  • ✓
    Evaporation
  • B
    Transpiration
  • C
    Precipitation
  • D
    Condensation
Answer
Correct option: A.
Evaporation
Changing water into vapours is called evaporation.
View full question & answer→
MCQ 831 Mark
How can water vapour in the air return to Earth?
  • A
    It evaporates and is blown by the wind
  • B
    It evaporates and forms clouds
  • ✓
    It condenses then precipitates
  • D
    It stick to any warm surface it comes in contact with
Answer
Correct option: C.
It condenses then precipitates
Water vapour condenses and fall on the earth in the form of rain.
View full question & answer→
MCQ 841 Mark
Water cycle means:
  • A
    Carrying of water using bicycles.
  • B
    Carrying of sea water to land by rivers etc.
  • C
    Carrying of tap water to our homes.
  • ✓
    Circulation of water between ocean and land.
Answer
Correct option: D.
Circulation of water between ocean and land.
Circulation of water between ocean and land.
View full question & answer→
MCQ 851 Mark
The source of energy which evaporates the most water from Earth's surface is:
  • A
    Volcanoes
  • B
    Lightning
  • ✓
    The sun
  • D
    Wind
Answer
Correct option: C.
The sun
The heat of sun evaporate the most water from Earth's surface.
View full question & answer→
MCQ 861 Mark
For which of the following purposes is saline water $NOT$ used$?$
  1. For washing clothes.
  2. For drinking.
  3. For agriculture.
  • A
    Only $(i)$ and $(ii).$
  • B
    Only $(ii)$ and $(iii).$
  • C
    Only $(i)$ and $(iii).$
  • ✓
    $(i), (ii)$ and $(iii).$
Answer
Correct option: D.
$(i), (ii)$ and $(iii).$

Saline water is hard due to dissolved salts in it. Therefore, it is not used for the given purposes.

View full question & answer→
MCQ 871 Mark
Floods cause extensive damage to:
  • A
    Crops.
  • B
    Property and human life.
  • C
    Domestic animals.
  • ✓
    All of the above.
Answer
Correct option: D.
All of the above.
Floods cause extensive damage to crop fields, villages and forests causing damage to property, human life, domestic animals, crops and wild animals of the forests.
View full question & answer→
MCQ 881 Mark
In which of the following case evaporation of water will be slowest?
  • A
    A tray of water kept in sunlight.
  • B
    A kettle of water kept on a burner.
  • ✓
    A glass of water kept in a room.
  • D
    A bucket of water kept on rooftop.
Answer
Correct option: C.
A glass of water kept in a room.
The rate of evaporation increases on increasing the temperature and on increasing the surface area. A glass of water kept in a room has minimum surface area in the given options, so rate of evaporation will be slowest.
View full question & answer→
MCQ 891 Mark
Out of these, which is not a source of surface water?
  • ✓
    Rain water.
  • B
    River and lake water.
  • C
    Spring water.
  • D
    Sea water.
Answer
Correct option: A.
Rain water.
Rainwater, river water and sea water are the examples of surface water.
View full question & answer→
MCQ 901 Mark
Forests that experience high levels of rainfall are called:
  • ✓
    Rain forests
  • B
    Snow forests
  • C
    Rain guages
  • D
    Flood forests
Answer
Correct option: A.
Rain forests
Rain forests
View full question & answer→
MCQ 911 Mark
Water table refers to:
  • A
    Level of surface water.
  • B
    Level of sea water.
  • ✓
    Level of groundwater.
  • D
    None of these.
Answer
Correct option: C.
Level of groundwater.
Level of groundwater.
View full question & answer→
MCQ 921 Mark
Name the scientists who showed that lightning and the spark from your clothes are essentially the same phenomena?
  • A
    Thomas Alva Edison
  • B
    Franklin D. Roosevelt
  • ✓
    Benjamin Franklin
  • D
    Issac Newton
Answer
Correct option: C.
Benjamin Franklin
Benjamin Franklin
View full question & answer→
MCQ 931 Mark
Aquatic plants take in oxygen from:
  • A
    Air in the atmosphere.
  • ✓
    Dissolved air in water.
  • C
    Do not need oxygen.
  • D
    None of these.
Answer
Correct option: B.
Dissolved air in water.
Dissolved air in water.
View full question & answer→
MCQ 941 Mark
Most of the well water and spring water are replenished by:
  • A
    Dams.
  • B
    Floods.
  • ✓
    Ground water.
  • D
    All of the above.
Answer
Correct option: C.
Ground water.
Ground water is the source of well water and spring water.
View full question & answer→
MCQ 951 Mark
Which of these constituents present in w air leads to the formation of fog and mist?
  • A
    Nitrogen.
  • B
    Oxygen.
  • ✓
    Water vapour.
  • D
    Carbon dioxide.
Answer
Correct option: C.
Water vapour.
The presence of water vapour in air leads to the formation of fog and mist at suitable temperature.
View full question & answer→
MCQ 961 Mark
Boiling point of water is
  • ✓
    $100^\circ C$
  • B
    $101^\circ C$
  • C
    $99^\circ C$
  • D
    $102^\circ C$
Answer
Correct option: A.
$100^\circ C$
Boiling point of water is $100^\circ C.$
View full question & answer→
MCQ 971 Mark
Soil erosion takes place due to:
  • ✓
    Floods.
  • B
    Drought.
  • C
    Transpiration.
  • D
    All of the above.
Answer
Correct option: A.
Floods.
Soil erosion takes place naturally due to floods.
View full question & answer→
MCQ 981 Mark
DIRECTIONS: Read the passage $(s)$ given below and answer the questions that/ allow Passage - Only a small fraction of water available on the earth is fit for use of plants, animals and humans. The total amount of water on earth remains the same, but the water available for use is very limited and is decreasing with over usage. Why is the demand for water increasing day by day?
  • A
    The quantity of water used per person is increasing day by day.
  • B
    The number of persons using water is increasing.
  • C
    More and more water is being used by industries.
  • ✓
    Only $(b)$ and $(c)$ are correct.
Answer
Correct option: D.
Only $(b)$ and $(c)$ are correct.
Only $(b)$ and $(c)$ are correct.
View full question & answer→
MCQ 1001 Mark
Which of the following is polluted by man or factories?
  • A
    Ponds.
  • B
    Rivers.
  • C
    Ground water.
  • ✓
    All of the above.
Answer
Correct option: D.
All of the above.
Ponds, rivers and ground water get polluted by man and factories.
View full question & answer→
MCQ 1011 Mark
Identify the source of ground water.
  • A
    Sub-soil water.
  • B
    River water.
  • ✓
    Rainwater.
  • D
    All of the above.
Answer
Correct option: C.
Rainwater.
Rain water is the source of ground water.
View full question & answer→
MCQ 1021 Mark
By boiling process water converts into:
  • ✓
    Water vapour
  • B
    Snow
  • C
    Hail
  • D
    Cloud
Answer
Correct option: A.
Water vapour
In boiling water absorbs heat and transfer to vapour state.
View full question & answer→
MCQ 1031 Mark
DIRECTIONS: Read the passage $(s)$ given below and answer the questions that/ allow Passage - If we put some water in a plate and allow the plate to lie in open in sunlight we find that the water from the plate disappears. Moreover even if we keep the plate in shade the water still disappears. If we take sea water in plate and allow it to stand in sunlight till whole of the water disappears, we find that:
  • ✓
    Nothing is left in the plate.
  • B
    Some solid is left behind.
  • C
    Some liquid is left behind.
  • D
    None of the above is correct.
Answer
Correct option: A.
Nothing is left in the plate.
Salts dissolved in sea water are left as solid residue.
View full question & answer→
MCQ 1041 Mark
DIRECTIONS: Read the passage (s) given below and answer the questions that/ allow Passage - If we put some water in a plate and allow the plate to lie in open in sunlight we find that the water from the plate disappears. Moreover even if we keep the plate in shade the water still disappears. The process of disappearance of water from the plate occurs
  • ✓
    Rapidly in sunlight.
  • B
    Rapidly in shade.
  • C
    With same speed in day and night.
  • D
    Occurs only in day time.
Answer
Correct option: A.
Rapidly in sunlight.
Rapidly in sunlight.
View full question & answer→
MCQ 1051 Mark
At some places water coming from the underground contains a lot of dissolved minerals and is called:
  • A
    Underground water.
  • ✓
    Spring.
  • C
    Natural water.
  • D
    None of these.
Answer
Correct option: B.
Spring.
Spring.
View full question & answer→
MCQ 1061 Mark
Instrument, which is used to detect and monitor rain is:
  • A
    Reengage
  • ✓
    Weather radar
  • C
    PH meter
  • D
    Hydrometer
Answer
Correct option: B.
Weather radar
Weather radar
View full question & answer→
MCQ 1071 Mark
$X$ is a process by which plants lose water. What is $X?$
  • A
    Evaporation.
  • ✓
    Transpiration.
  • C
    Condensation.
  • D
    Translocation.
Answer
Correct option: B.
Transpiration.

Transpiration is a process by which plants lose water.

View full question & answer→
MCQ 1081 Mark
DIRECTIONS: Read the passage $(s)$ given below and answer the questions that/ allow Passage - Apart from drinking, there are so many activities for which we use water. Most of the water is in oceans and seas. We draw drinking water from taps which is further drawn from a well or a lake etc. We need water for:
  • A
    Industries.
  • B
    Producing many things.
  • ✓
    Both the above.
  • D
    None of these.
Answer
Correct option: C.
Both the above.
Both the above.
View full question & answer→
MCQ 1091 Mark
The percentage of water in potato is:
  • A
    $88$
  • ✓
    $75$
  • C
    $90$
  • D
    $95$
Answer
Correct option: B.
$75$
$75$ of potato is water.
View full question & answer→
MCQ 1101 Mark
Plants need water to:
  • A
    Grow.
  • B
    Cook food.
  • C
    None of these.
  • ✓
    Both $(a)$ and $(b).$
Answer
Correct option: D.
Both $(a)$ and $(b).$
Both $(a)$ and $(b).$
View full question & answer→
MCQ 1111 Mark
Which of the following is $NOT$ one of the processes including in water cycle$?$
  • A
    Condensation
  • B
    Evaporation
  • C
    Precipitation
  • ✓
    Erosion
Answer
Correct option: D.
Erosion

Erosion is not a part of water cycle.

View full question & answer→
MCQ 1121 Mark
Why do we always see a lightning before we hear thunder?
  • A
    Because lightning occurs first.
  • ✓
    Because light travels faster than sound.
  • C
    Because thunder occurs late.
  • D
    Because sound travels fester than light.
Answer
Correct option: B.
Because light travels faster than sound.
The speed of light $(3\times108\frac{\text{m}}{\text{s}})$ is more than speed of sound $332\frac{\text{m}}{\text{s}}$ in air.
So, we can see lightning before we hear thunder.
View full question & answer→
MCQ 1131 Mark
Ocean water reaches us:
  • A
    By rivers.
  • B
    By ponds.
  • ✓
    By water cycle.
  • D
    All of these.
Answer
Correct option: C.
By water cycle.
By water cycle.
View full question & answer→
MCQ 1141 Mark
Ice changes to water through the process of:
  • A
    Freezing
  • B
    Evaporation
  • ✓
    Melting
  • D
    Condensation
Answer
Correct option: C.
Melting
In melting solid after absorbing heat converts into liquid.
View full question & answer→
MCQ 1151 Mark
Lightning contains millions of volts of electricity. $(2)$ Direct lightning are usually fatal. Which statements) is/are correct?
  • A
    $1$ only
  • B
    $2$ only
  • ✓
    Both $(1)$ and $(2)$
  • D
    Neither $(1)$ nor $(2)$
Answer
Correct option: C.
Both $(1)$ and $(2)$
Both $(1)$ and $(2)$
View full question & answer→
MCQ 1161 Mark
What is the sound of thunder caused by a nearby main trunk airwave?
  • A
    Sharp crakle
  • B
    Low rumble
  • ✓
    Loud crash
  • D
    Feeble crash
Answer
Correct option: C.
Loud crash
Loud crash
View full question & answer→
MCQ 1171 Mark
DIRECTIONS: Match Column$-I$ with Column$-II$ and select the correct answer using the codes given below the columns.
S.No.
Column-$I$
S.No.
Column-$II$
$A$
Drought.
$(p)$
Slow process.
$B$
Surface water.
$(q)$
Rivers, ponds etc.
$C$
Evaporation.
$(r)$
Loss of water by plants.
$D$
Transpiration.
$(s)$
Absence of rains for a long time.
  • ✓
    $A\rightarrow (s); B\rightarrow (q); C\rightarrow (p); D\rightarrow (r).$
  • B
    $A\rightarrow (s); B\rightarrow (r); C\rightarrow (q); D\rightarrow (p).$
  • C
    $A\rightarrow (s); B\rightarrow (p); C\rightarrow (q); D\rightarrow (r).$
  • D
    $A\rightarrow (p); B\rightarrow (s); C\rightarrow (r); D\rightarrow (q).$
Answer
Correct option: A.
$A\rightarrow (s); B\rightarrow (q); C\rightarrow (p); D\rightarrow (r).$
$A\rightarrow (s); B\rightarrow (q); C\rightarrow (p); D\rightarrow (r).$
View full question & answer→
MCQ 1181 Mark
Ground water gets recharged by the Mr process of:
  • A
    Aquification.
  • B
    Transpiration.
  • ✓
    Infiltration.
  • D
    Transportation.
Answer
Correct option: C.
Infiltration.
Ground water gets recharged by the process of infiltration.
View full question & answer→
MCQ 1191 Mark
Water cycle can be represented as.

The process that occurs in step $'A'$ is called:
  • ✓
    Evaporation.
  • B
    Transpiration.
  • C
    Condensation.
  • D
    None of these.
Answer
Correct option: A.
Evaporation.
Evaporation.
View full question & answer→
MCQ 1201 Mark
Wells are fed by:
  • A
    Pond water.
  • B
    Lake water.
  • C
    Rain water.
  • ✓
    Ground water.
Answer
Correct option: D.
Ground water.
Wells are fed by groundwater. The underground water can be taken out by digging a well into the ground. It is called well water.
View full question & answer→
MCQ 1211 Mark
Which of the following is incorrect? m an event of lightning, we should:
  • A
    Not hold any metallic pipes.
  • ✓
    Stand under a tree if in a plain area.
  • C
    Remove all metallic objects from our pockets if in a plain area.
  • D
    Disconnect all electrical appliances connected to external antenna.
Answer
Correct option: B.
Stand under a tree if in a plain area.
Stand under a tree if in a plain area.
View full question & answer→
MCQ 1221 Mark
At the time of cloud formation, heat is released into the atmosphere? It is true:
  • ✓
    Yes
  • B
    No
  • C
    Sometimes
  • D
    Cannot say
Answer
Correct option: A.
Yes
Since, water vapour is cool down while forming clouds, so heat is released in this process.
View full question & answer→
MCQ 1231 Mark
Given in the figure are four containers that contain the same amount of water.

In which of the following containers will water evaporate the slowest?
  • A
    $Q.$
  • B
    $R.$
  • C
    $P.$
  • ✓
    $S.$
Answer
Correct option: D.
$S.$

Container $S$ (a flask) has the smallest surface area of water exposed to the atmosphere. Thus, the rate of evaporation will be the slowest in flask $S.$

View full question & answer→
MCQ 1241 Mark
Where is the most water found on Earth?
  • A
    In glaciers
  • B
    In lakes
  • C
    In rivers
  • ✓
    In oceans
Answer
Correct option: D.
In oceans
Oceans are the biggest source of water on the earth.
View full question & answer→
MCQ 1251 Mark
Lightning can never strike the same place twice.
  • A
    It is true
  • ✓
    It is false
  • C
    Maybe
  • D
    May not be
Answer
Correct option: B.
It is false
Lightning can strike the same place more than once.
View full question & answer→
MCQ 1261 Mark
If various steps of water cycle are marked as below: $A$ for rains $B$ for evaporation of water $C$ for water in rivers and lakes $D$ for cloud formation If we take $B$ as the first step in water cycle then the correct arrangement of letters $A, B, C$ and $D$ to correctly represent the water cycle will be:
  • ✓
    $B, D, A, C.$
  • B
    $B, A, C, D.$
  • C
    $B, C, D, A.$
  • D
    $B, D, C, A.$
Answer
Correct option: A.
$B, D, A, C.$
View full question & answer→
MCQ 1271 Mark
Why do you feel cool after you start sweating?
  • ✓
    Evaporation of water droplets.
  • B
    Condensation of water droplets.
  • C
    Freezing of water droplets.
  • D
    Solidification of salts in the water droplets.
Answer
Correct option: A.
Evaporation of water droplets.
During summer, water, from our body as sweat. Evaporation causes cooling because water droplets present on the skin require some heat to evaporate, which they take from the body.
View full question & answer→
MCQ 1281 Mark
Human body contains water up to:
  • A
    $90\%.$
  • B
    $50\%.$
  • ✓
    $70\%.$
  • D
    $80\%.$
Answer
Correct option: C.
$70\%.$
Human body contains water upto $70\%.$
View full question & answer→
MCQ 1291 Mark
Mrs. Uma has put a wet cloth to dry as shown below.

Which part of the towel will dry faster$?$
  • A
    $X.$
  • B
    $Y.$
  • ✓
    $Z.$
  • D
    Either $X$ or $Y.$
Answer
Correct option: C.
$Z.$

 The effect of wind will be more towards the bottom part of the towel as this part is free. Thus, part $Z$ will dry faster than the other parts of the towel.

View full question & answer→
MCQ 1301 Mark
The process of transferring the charge from a charged object to the earth is called:
  • ✓
    Earthing
  • B
    Discharging
  • C
    Transferring
  • D
    Charging
Answer
Correct option: A.
Earthing
Lightning conductor thus is used to protect buildings from lightning is earthed so that atmospheric charge reached deep inside the earth.
View full question & answer→
MCQ 1311 Mark
Which of the following is an example of reuse of water to prevent its wastage?
  • A
    By reusing the water from washing clothes to cook.
  • B
    By discharging factory waste in rivers and canals.
  • C
    By discharging sewage and waste materials into oceans.
  • ✓
    By reusing the water from washing clothes to wash floor.
Answer
Correct option: D.
By reusing the water from washing clothes to wash floor.
By reusing the water from washing clothes to wash floor.
View full question & answer→
MCQ 1321 Mark
Hardness of water is due to presence of:
  • A
    Salts of calcium.
  • ✓
    Salts of magnesium.
  • C
    Both $(a)$ and $(b).$
  • D
    None of these.
Answer
Correct option: B.
Salts of magnesium.
Salts of magnesium.
View full question & answer→
MCQ 1331 Mark
Which of these occurs due to condensation?
  • A
    The drying of wet clothes.
  • ✓
    Water drops appearing on the outer side of a cool water bottle.
  • C
    Steam rising from wet clothes when they are ironed.
  • D
    Black board gets dried after it is wiped with wet cloth.
Answer
Correct option: B.
Water drops appearing on the outer side of a cool water bottle.
Condensation is the change in the state of matter from the gas into liquid droplets.
View full question & answer→
MCQ 1341 Mark
What would happen if it does not rain in a region for a year?
  • A
    Soil will become dry
  • B
    Water bodies will become dry
  • C
    There will be condition called draught.
  • ✓
    All of the above.
Answer
Correct option: D.
All of the above.
All of the above.
View full question & answer→
MCQ 1351 Mark
Which is a result of condensation of water vapours?
  • A
    Rain
  • B
    Snowfall
  • C
    Hail
  • ✓
    Tiny water droplets
Answer
Correct option: D.
Tiny water droplets
Water vapour, being brighter, rises up in the atmosphere and cools down. It further condenses to form tiny droplets.
View full question & answer→
MCQ 1361 Mark
What causes puddles to get smaller and smaller?
  • A
    Condensation
  • ✓
    Evaporation
  • C
    Precipitation
  • D
    The Sun
Answer
Correct option: B.
Evaporation
Evaporation
View full question & answer→
MCQ 1371 Mark
Why is water scarcity increasing day by day?
  • A
    Water cycle has stopped functioning.
  • B
    The total amount of water on earth has decreased.
  • ✓
    The consumption of water has increased.
  • D
    There is an increasing frequency of floods.
Answer
Correct option: C.
The consumption of water has increased.
Water is becoming scarce due to over usage and wastage of water due to improper use.
View full question & answer→
MCQ 1381 Mark
How much of Earth's water is fresh water$?$
  • A
    $97\%$
  • B
    $50\%$
  • ✓
    $3\%$
  • D
    $1\%$
Answer
Correct option: C.
$3\%$

 Only $2.6\%$ of total water is fit for human consumption.

View full question & answer→
MCQ 1391 Mark
What does heat from the sun cause liquid water to do?
  • ✓
    Evaporate into the air
  • B
    Travel deeper into the soil
  • C
    Change into a solid
  • D
    Fall from clouds as rain
Answer
Correct option: A.
Evaporate into the air
As the temperature rises liquid water evaporates into the air.
View full question & answer→
MCQ 1401 Mark
The water cycle begins with:
  • A
    Condensation
  • B
    Evaporation
  • C
    Precipitation
  • ✓
    The water cycle has no beginning or end.
Answer
Correct option: D.
The water cycle has no beginning or end.
Since, water cycle is a cyclic process, so it can be start from any stage.
View full question & answer→
MCQ 1411 Mark
The water vapours, that are formed by evaporation of sea water:
  • ✓
    Consist of pure water.
  • B
    Contains dissolved salts in it.
  • C
    Both the above.
  • D
    None of these.
Answer
Correct option: A.
Consist of pure water.
It is pure water. Salts are left behind in evaporation.
View full question & answer→
MCQ 1421 Mark
Circulation of water between ocean and land is known as:
  • ✓
    Water cycle
  • B
    Rain cycle
  • C
    Water management
  • D
    Water harvesting
Answer
Correct option: A.
Water cycle
Constant flow of water from the earth to the atmosphere and back to the earth is known as water cycle.
View full question & answer→
MCQ 1431 Mark
Select the process that plays an important role in bringing water back to earth.
  • A
    Evaporation.
  • ✓
    Condensation.
  • C
    Transpiration.
  • D
    None of these.
Answer
Correct option: B.
Condensation.
Condensation plays an important role in bringing water back to earth.
View full question & answer→
MCQ 1441 Mark
Which of the following statements is incorrect?
  • A
    Water evaporates from plants, animals and oceans.
  • ✓
    Animals living in water are not harmed during the floods.
  • C
    Vegetation cannot thrive during droughts.
  • D
    Water available for human use is very limited during floods.
Answer
Correct option: B.
Animals living in water are not harmed during the floods.
Flood water is heavily polluted and also animals living in water get displaced from their original habitat.
View full question & answer→
MCQ 1451 Mark
Which is not a part of water cycle?
  • A
    Cloud formation
  • B
    Rain
  • ✓
    Drinking by animals
  • D
    Sun
Answer
Correct option: C.
Drinking by animals
Drinking by animals.
View full question & answer→
MCQ 1461 Mark
What is rain water harvesting?
  • A
    Storing ground water present in wells.
  • B
    Stopping the cultivation of crops to save water.
  • C
    The seeping of water into the ground.
  • ✓
    Collecting rainwater and storing it for future use.
Answer
Correct option: D.
Collecting rainwater and storing it for future use.
The collecting and storing of rain water in special pits for future use is called rain water harvesting.
View full question & answer→
MCQ 1471 Mark
Which of the following is not a form of precipitation?
  • A
    Hailstorm.
  • B
    Snow.
  • C
    Rain.
  • ✓
    None of these.
Answer
Correct option: D.
None of these.
None of these.
View full question & answer→
MCQ 1481 Mark
Which of the following statement$(s)$ is/are correct?
  • ✓
    Water is called 'Elixir of Life'.
  • B
    Approximately $8$ glasses of water is needed to produce a page of your book.
  • C
    About $75\%$ of earth is covered with water.
  • D
    All of the above.
Answer
Correct option: A.
Water is called 'Elixir of Life'.
Water is called 'Elixir of Life'.
View full question & answer→
MCQ 1491 Mark
Water scarcity is a problem in our country. What are the ways by which we can conserve water?
  1. Rain water harvesting.
  2. Drip irrigation.
  3. Deforestation.
  • ✓
    Only $(i)$ and $(ii).$
  • B
    Only $(ii)$ and $(iii).$
  • C
    Only $(i)$ and $(iii).$
  • D
    $(i), (ii)$ and $(iii).$
Answer
Correct option: A.
Only $(i)$ and $(ii).$

 The methods of water conservation are rain water harvesting and drip irrigation.

View full question & answer→
MCQ 1501 Mark
Plants release large amount of water vapour into the atmosphere by the process called
  • A
    evaporation
  • B
    condensation
  • C
    precipitation
  • ✓
    transpiration
Answer
Correct option: D.
transpiration
transpiration
View full question & answer→
MCQ 1511 Mark
Boiling point of water is
  • ✓
    $100^\circ C$
  • B
    $101^\circ C$
  • C
    $99^\circ C$
  • D
    $102^\circ C$
Answer
Correct option: A.
$100^\circ C$
$100^\circ C$
View full question & answer→
MCQ 1521 Mark
Out of these, which is not a source of surface water?
  • A
    rain water
  • B
    river and lake water
  • ✓
     Spring water
  • D
    sea water
Answer
Correct option: C.
 Spring water
 Spring water
View full question & answer→
MCQ 1541 Mark
Circulation of water between ocean and land is known as
  • ✓
    water cycle
  • B
    rain cycle
  • C
    water management
  • D
    water harvesting
Answer
Correct option: A.
water cycle
water cycle
View full question & answer→
MCQ 1551 Mark
Which one is the purest form of water?
  • A
    River water
  • B
    Groundwater
  • ✓
    Rainwater
  • D
    Ocean water
Answer
Correct option: C.
Rainwater
Rainwater
View full question & answer→
MCQ 1561 Mark
Which is a result of condensation of water vapours?
  • A
    Rain
  • B
     Snowfall
  • C
     Hail
  • ✓
    Tiny water droplets
Answer
Correct option: D.
Tiny water droplets
Tiny water droplets
View full question & answer→
MCQ 1571 Mark
Which is not a part of water cycle?
  • A
    Cloud formation
  • B
    Rain
  • ✓
    Drinking by animals
  • D
    sun
Answer
Correct option: C.
Drinking by animals
Drinking by animals
View full question & answer→
MCQ 1581 Mark
Potable water is
  • A
    ocean water
  • ✓
    groundwater at selected places
  • C
    river water
  • D
    ponds water
Answer
Correct option: B.
groundwater at selected places
groundwater at selected places
View full question & answer→
MCQ 1591 Mark
Which one is a process in which water changes into vapours in atmosphere?
  • ✓
    Evaporation
  • B
    transpiration
  • C
    Precipitation
  • D
    condensation
Answer
Correct option: A.
Evaporation
Evaporation
View full question & answer→
Generate Paper FreeAll Water topics