Which of the following type of irrigation system is used in areas closer to rivers?
- ADug wells
- BTanks
- ✓River lift
- DCanals
Answer: C.
View full solution →Question types
Model Paper 3 question types
45 questions across 6 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
45
Questions
6
Question groups
5
Question types
01
M.C.Q. [1 M]
16 Q→02Assertion (A) & Reason (B) MCQ
4 Q→03Que-Ans (Each of 2 Mark )
8 Q→04Que-Ans (Each of 3 Mark )
9 Q→05Que-Ans (Each of 5 Mark )
5 Q→06Case study ( 4 Marks )
3 Q→Sample Questions
Model Paper 3 questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Which one is a physical change?
- AMixing $BaSO_4 + NaCl$
- BMixing $\text{NH3}$ and $\text{HCI}$
- CBurning magnesium in air
- ✓Adding $\text{NaCl}$ to water
Answer: D.
View full solution →A food sample turned blue-black after addition of a few drops of iodine solution. This sample contains:
- ✓starch
- Bfat
- Cprotein
- Dglucose
Answer: A.
View full solution →The only cell organelle seen in prokaryotic cell is
- ✓ribosomes
- Bmitochondria
- Clysosomes
- Dplastids
Answer: A.
View full solution →Chlorenchyma and serenchyma are modified/specialised
- Aphloem
- ✓parenchyma
- Csclerenchyma
- Dcollenchyma
Answer: B.
View full solution →Assertion (A): Bohr's orbits are called stationary orbits.
Reason (R): Electrons remain stationary in these orbits for sometime.
Reason (R): Electrons remain stationary in these orbits for sometime.
- ABoth A and R are true and R is the correct explanation of A
- BBoth A and R are true but R is not the correct explanation of A
- ✓A is true but R is false.
- DA is false but R is true.
Answer: C.
View full solution →Assertion (A): Epithelial tissue form the lining of the mouth and alimentary canal and protect these organs.
Reason (R): They help in the absorption of water and nutrients.
Reason (R): They help in the absorption of water and nutrients.
- ABoth A and R are true and R is the correct explanation of A
- ✓Both A and R are true but R. is not the correct explanation of A.
- CA is true but R is false.
- DA is false but R is true
Answer: B.
View full solution →Assertion (A): Gases are compressible but liquids are not.
Reason (R): Structure of gas and liquid are different.
Reason (R): Structure of gas and liquid are different.
- ✓Both A and R are true and R is the correct explanation of A
- BBoth A and R are true but R is not the correct explanation of A.
- CA is true but R is false
- DA is false but R. is true.
Answer: A.
View full solution →Assertion (A): Motion of satellites around their planets is considered as accelerated motion.
Reason (R): During their motion, the speed remains constant, while the direction of motion changes continuously.
Reason (R): During their motion, the speed remains constant, while the direction of motion changes continuously.
- ✓Both A and R are true and R is the correct explanation of A
- BBoth A and R are true but R is not the correct explanation of A
- CA is true but R is false.
- DA is false but R is true.
Answer: A.
View full solution →Describe Bohr's model of the atom.
Which of the following has more inertia:
a. a rubber ball and a stone of the same size?
b. a blcycle and a train?
c. a five rupees coin and a con-rupee coin?
a. a rubber ball and a stone of the same size?
b. a blcycle and a train?
c. a five rupees coin and a con-rupee coin?
An automobile vehicle has a mass of $1500 \ kg$ . What mast be the force between the vehicle and road if the vehicle is to be stopped with the negative acceleration of $1.7 ms^{-2}$ ?
View full solution →The room temperature on Celsius scale is $25^\circ C$. Convert it into the other two scales of measurement.
View full solution →A girl is sitting in the middle of a park of dimension 12m x 12 m. On the left side of it there is a building adjoining the park and on the right side of the park, there is a road adjoining the park. A sound is produced on the road by a cracker. Is it possible for the girl to hear the echo of this sound? Explain your answer.
i. Which process in meristematic tissue converts it to permanent tissue?
ii. Which feature of meristematic tissue helps aquatic plants to maintain buoyancy in water?
iii. Why epidermis of plants living in dry habitats is thicker?
iv. Identify the following.
a. Living component of xylem
b. Dead element of phloem
v. Which type of conducting tissues conduct water and minerals vertically?
ii. Which feature of meristematic tissue helps aquatic plants to maintain buoyancy in water?
iii. Why epidermis of plants living in dry habitats is thicker?
iv. Identify the following.
a. Living component of xylem
b. Dead element of phloem
v. Which type of conducting tissues conduct water and minerals vertically?
Illustrate only a plant cell as seen under electron microscope. How is it different from animal cell?
How is a prokaryotic cell different from a eukaryotic cell?
The velocity-time graph of an object of mass m = 50 g is shown in the figure. Observe the graph carefully and answer the following questions.
i. Calculate the force on the object in time interval 0 to 35.
ii. Calculate the force on the object in the time interval 6 to 10 s.
iii. Is there any time interval in which no force acts on the object? Justify your answer
i. Calculate the force on the object in time interval 0 to 35.
ii. Calculate the force on the object in the time interval 6 to 10 s.
iii. Is there any time interval in which no force acts on the object? Justify your answer
Due to heavy rains and speedy winds a tree broke and fell on the road. Two persons from local shops came and begin to remove that broken part of the tree, but in vain as the log was too heavy. A passerby came to their help with a few solid heavy sticks. Consequently, the heavy log was put aside and the commutation on the road began as usual.
(a) Comment upon the value(s) displayed by the passerby?
(b) Name the energy stored when the heavy log of the tree was lifted to some height?
(a) Comment upon the value(s) displayed by the passerby?
(b) Name the energy stored when the heavy log of the tree was lifted to some height?
Distinguish between compounds and mixtures.
Make a comparison and write down ways in which plant cells are different from animal cells.
i. State what will happen when human red blood cells are placed in a hypotonic salt/sugar solution.
ii. Why plant cell shrinks when kept in a hypertonic solution.
iii. Why lysosomes are known as suicidal bags?
ii. Why plant cell shrinks when kept in a hypertonic solution.
iii. Why lysosomes are known as suicidal bags?
Show that the weight of an object on the moon is $\frac{1}{6}$ th of its weight on the earth. Given, the mass of the earth $M _{ e }=$ $6 \times 10^{24} kg$, mass of the moon, $M _{ m }=7 \cdot 4 \times 10^{22} kg$, The radius of the earth, $R _{ e }=6400 km$ and radius of the moon, $R _{ m }$ $=1740 km$.
View full solution →A stone is dropped from the edge of a roof.
$i.$ How long does it take to fall $4.9 m?$
$ii.$ How fast does it move at the end of that fall?
$iii.$ How fast does it move at the end of $7.9 m?$
$iv.$ What is its acceleration after $1s$ and after $2 s?$
View full solution →$i.$ How long does it take to fall $4.9 m?$
$ii.$ How fast does it move at the end of that fall?
$iii.$ How fast does it move at the end of $7.9 m?$
$iv.$ What is its acceleration after $1s$ and after $2 s?$
Read the following text carefully and answer the questions that follow:
A solution of a solid in a liquid such as water can be prepared by adding it slowly to water with constant stirring at a certain temperature $($room temperature$)$. If the addition process is continued, a stage is ultimately reached in the dissolution process when no more of the solid dissolves. Rather it starts setlling at the bottom of the container such as a glass beaker. The solution at this stage is said to be saturated. The solubility of a solute is always expressed with respect to the saturated solution. It may be defined as the maximum amount of the solute that can be dissolved in $100 g$ of the solvent to form a saturated solution at a given temperature. Please remember that the role of temperature is very important. If temperature is increased, the solution becomes unsaturated. In case the temperature is decreased, the solution becomes supersaturated. As a result, crust of the solute gets deposited on the surface.
$i.$ What do mean by the term Solubility?
$ii. 20 g$ of a solute are dissolved in 500 g of the solvent. The solubility of the solute is:
$iii.$ When a saturated solution becomes unsaturated?
OR
What do you mean by concentration of solution?
View full solution →A solution of a solid in a liquid such as water can be prepared by adding it slowly to water with constant stirring at a certain temperature $($room temperature$)$. If the addition process is continued, a stage is ultimately reached in the dissolution process when no more of the solid dissolves. Rather it starts setlling at the bottom of the container such as a glass beaker. The solution at this stage is said to be saturated. The solubility of a solute is always expressed with respect to the saturated solution. It may be defined as the maximum amount of the solute that can be dissolved in $100 g$ of the solvent to form a saturated solution at a given temperature. Please remember that the role of temperature is very important. If temperature is increased, the solution becomes unsaturated. In case the temperature is decreased, the solution becomes supersaturated. As a result, crust of the solute gets deposited on the surface.
$i.$ What do mean by the term Solubility?
$ii. 20 g$ of a solute are dissolved in 500 g of the solvent. The solubility of the solute is:
$iii.$ When a saturated solution becomes unsaturated?
OR
What do you mean by concentration of solution?
Read the following text carefully and answer the questions that follow:
Animal tissue has various types of epithelial tissue, connective tissue, muscular tissue, and nervous tissue and of tissue one of them is the connective tissue which consists of blood, bone, cartilage. Blood is the fluid matrix called plasma in which red blood cells, white blood cells, and platelet are suspended while bone form the framework that supports the body it also anchors the muscle and supports the main organ of the body. Two bones are connected by a ligament. cartilage is a solid matrix composed of sugar and protein.
i. Name the tissue which connects muscle to a bone.
ii. Matrix of bone cells are composed of
iii. Two bones are connected by ligament how muscle connects to the bone?
OR
Where the cartilage is found in the human body?
Animal tissue has various types of epithelial tissue, connective tissue, muscular tissue, and nervous tissue and of tissue one of them is the connective tissue which consists of blood, bone, cartilage. Blood is the fluid matrix called plasma in which red blood cells, white blood cells, and platelet are suspended while bone form the framework that supports the body it also anchors the muscle and supports the main organ of the body. Two bones are connected by a ligament. cartilage is a solid matrix composed of sugar and protein.
i. Name the tissue which connects muscle to a bone.
ii. Matrix of bone cells are composed of
iii. Two bones are connected by ligament how muscle connects to the bone?
OR
Where the cartilage is found in the human body?
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