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Matter in Our Surroundings Science - Matter in Our Surroundings

Bihar Board (BSEB) - STD 9 - Science (BSEB - English Medium). 461 questions in this chapter.

Question types

Matter in Our Surroundings question types

461 questions across 9 question groups — pick any mix to generate a Science paper with step-by-step answer keys.

461
Questions
9
Question groups
5
Question types
Sample Questions

Matter in Our Surroundings questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1M.C.Q. [1 M]1 Mark
Why does the boiling point of water decrease at higher altitudes?
  • ✓
    Atmospheric pressure is low at higher altitudes.
  • B
    Temperature is low at higher altitudes.
  • C
    Atmospheric pressure is high at higher altitudes.
  • D
    None of the above.

Answer: A.

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Q 2M.C.Q. [1 M]1 Mark
When salt is dissolved in water $........?$
  • A
    The particles of water get into the spaces between particles of salt
  • ✓
    The particles of salt get into the spaces between particles of water
  • C
    The particles of salt sit on the top of particles of water
  • D
    The particles of water sit on the top of particles of salt

Answer: B.

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Q 3M.C.Q. [1 M]1 Mark
A gas fills completely the vessel in which it is kept, because:
  • A
    Of weak intermolecular attractive forces.
  • B
    Of strong intermolecular attractive forces.
  • ✓
    Of very weak intermolecular repulsive forces.
  • D
    Of rigidity.

Answer: C.

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Q 4M.C.Q. [1 M]1 Mark
Evaporation that occurs directly from the solid phase below the melting point is called as:
  • ✓
    Sublimation
  • B
    Condensation
  • C
    Distillation
  • D
    None of above

Answer: A.

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Q 5M.C.Q. [1 M]1 Mark
The smell of hot sizzling food reaches you several meters away, but to get the smell of the cold food you have to go close.Which property of matter does this activity show:
  • A
    Particles of matter have space
  • ✓
    Energy of particles of matter increases with increase in temperature
  • C
    Particles of matter attract each other
  • D
    None of the above

Answer: B.

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Q 6Assertion (A) & Reason (B) MCQ1 Mark
In the following questions, a statement of Assertion $(A)$ is followed by a statement of Reason $(R)$. Mark the correct choice as:
Assertion: The process of diffusion is always followed by effusion.
Reason: Both diffusion and effusion deal with spreading of gas.
  • A
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
  • ✓
    If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
  • C
    If Assertion is true but Reason is false.
  • D
    If Assertion is false, but Reason is true.

Answer: B.

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Q 7Assertion (A) & Reason (B) MCQ1 Mark
In the following Questions, the Assertion and Reason have been put forward. Read the statements carefully and choose the correct alternative from the following:
Assertion: Molten ionic solid conducts electricity.
Reason: On melting ions become free to move.
  • ✓
    Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.
  • B
    The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.
  • C
    Assertion is true but the Reason is false.
  • D
    The statement of the Assertion is false but the Reason is true.

Answer: A.

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Q 8Assertion (A) & Reason (B) MCQ1 Mark
In the following questions, a statement of Assertion $(A)$ is followed by a statement of Reason $(R)$. Mark the correct choice as:
Assertion: Liquids diffuse less easily as compared to gases.
Reason: Intermolecular forces are greater in gases.
  • A
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
  • B
    If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
  • ✓
    If Assertion is true but Reason is false.
  • D
    If Assertion is false, but Reason is true.

Answer: C.

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Q 9Assertion (A) & Reason (B) MCQ1 Mark
In the following questions, a statement of Assertion $(A)$ is followed by a statement of Reason $(R)$. Mark the correct choice as:
Assertion: Camphor disappears without leaving any residue.
Reason: Camphor undergoes sublimation.
  • ✓
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
  • B
    If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
  • C
    If Assertion is true but Reason is false.
  • D
    If Assertion is false, but Reason is true.

Answer: A.

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Q 10Assertion (A) & Reason (B) MCQ1 Mark
In the following Questions, the Assertion and Reason have been put forward. Read the statements carefully and choose the correct alternative from the following:.
 Assertion: We feel more cold after taking bath with hot water.
Reason: Evaporation of hot water takes place faster which causes cooling.
  • A
    Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.
  • ✓
    The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.
  • C
    Assertion is true but the Reason is false.
  • D
    The statement of the Assertion is false but the Reason is true.

Answer: B.

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Q 13true or false1 Mark
State whether the following statement is true or false: Red brown bromine vapour diffuse into air in a gas jar but the colourless air molecules do not diffuse into bromine vapour.
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Q 15Fill in the blank1 Mark
Fill in the blank. At room temperature the forces of attraction between the particles of solid substances are _______ than those which exist in the gaseous state.
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Q 17Fill in the blank1 Mark
Fill in the following blanks with suitable words:
The arrangement of particles is less ordered in the ________ State. However, there is no order in the ________ State.
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Q 27Que-Ans (Each of 2 Mark )2 Marks
When water is heated to a temperature $x$, it gets converted into steam at temperature $x$ by a process called $R$. And when steam at temperature $x$ is cooled, it gets reconverted in to water at the same temperature $x$ by a process called $S$.
  1. How much is the value of $x$ in Kelvin?
  2. What is the process $R$ called?
  3. What is the name of the energy absorbed during the process $R$?
  4. What is process $S$ known as?
  5. What is the name of energy released during the process $S$ known as?
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Q 35Que-Ans (Each of 5 Mark )5 Marks
When extremely small particles $X$ derived from the another of a flower were suspended in a liquid $Y$ and observed through a microscope, it was found that the particles $X$ were moving throughout the liquid $Y$ in a very zig zag way. It was also observed that warmer the liquid $Y$, faster the particles $X$ moved in its surface.
  1. What could particles $X$ be?
  2. What do you think liquid $Y$ is?
  3. What is the zig-zag movement of particles $X$?
  4. What is causing the zig-zag movement of particles $X$?
  5. Name the scientist who discovered this phenomenon.
  6. What does this experiment tell us about the nature of liquid $Y$?
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Q 40Case study ( 4 Marks )4 Marks
You must have observed that the rate of evaporation increases with–
  • an increase of surface area:
  • We know that evaporation is a surface phenomenon. If the surface area is increased, the rate of evaporation increases. For example, while putting clothes for drying up we spread them out.
  • an increase of temperature:
With the increase of temperature, more number of particles get enough kinetic energy to go into the vapour state.
In an open vessel, the liquid keeps on evaporating. The particles of liquid absorb energy from the surrounding to regain the energy lost during evaporation. This absorption of energy from the surroundings makes the surroundings cold. What happens when you pour some acetone (nail polish remover)$ on your palm? The particles gain energy from your palm or surroundings and evaporate causing the palm to feel cool. After a hot sunny day, people sprinkle water on the roof or open ground because the large latent heat of vaporization of water helps to cool the hot surface.
$i.)$ Evaporation is surface phenomenon. True or false
$a.)$ True
$b.)$ False
$c.)$ None of these
$ii.)$ As temperature increases the rate of evaporation is
$a.)$ increases
$b.)$ decreases
$c.)$ remains constant
$d.)$ None of these
$iii.)$ The rate of evaporation increases with
$a.)$ Increase in wind speed
$b.)$ Decrease in wind speed
$c.)$ Does not have any effect from wind speed
$d.)$ None of these
$iv.)$ What happens when you pour some acetone (nail polish remover) on your palm?
$v.)$ We are able to sip hot tea from saucer than from cup. Why?
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Q 41Case study ( 4 Marks )4 Marks
Do we always need to heat or change pressure for changing the state of matter? Can you quote some examples from everyday life where change of state from liquid to vapour takes place without the liquid reaching the boiling point? In the case of liquids, a small fraction of particles at the surface, having higher kinetic energy, is able to break away from the forces of attraction of other particles and gets converted into vapour. This phenomenon of change of a liquid into vapors at any temperature below its boiling point is called evaporation.
$i.)$ Evaporation of liquid takes place at
$a.)$ Boiling point
$b.)$ Above boiling point
$c.)$ Below boiling point
$d.)$ None of these
$ii.)$ Evaporation takes place at surface of liquid because
$a.)$ They are heavy as compare to other particles
$b.)$ They have sufficient kinetic energy to break the force
$c.)$ They are light weight as compare to other particles
$d.)$ None of these
$iii.)$ During evaporation particles of liquid change into vapour
$a.)$ From the surface
$b.)$ From the bottom
$c.)$ From all over the liquid
$d.)$ None of these
$iv.)$ Define evaporation.
$v.)$ Explain process of evaporation
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Q 42Case study ( 4 Marks )4 Marks
What happens inside the matter during change of state? On increasing the temperature of solids, the kinetic energy of the particles increases. Due to the increase in kinetic energy, theParticles start vibrating with greater speed. The energy supplied by heat overcomes the forces of attraction between the particles. The particles leave their fixed positions and start moving more freely. A stage is reached when the solid melts and is converted to a liquid. The minimum temperature at which a solid melts to become a liquid at the atmospheric pressure is called its melting point.
The temperature of the system does not change after the melting point is reached, till all the ice melts. This happens even though we continue to heat the beaker, that is, we continue to supply heat. This heat gets used up in changing the state by overcoming the forces of attraction between the particles. The amount of heat energy that is required to change $1 \ kg$ of a solid into liquid at atmospheric pressure at its melting point is known as the latent heat of fusion. So, particles in water at $0^0 C (273 K)$$ have more energy as compared to particles in ice at the same temperature.
The temperature at which a liquid starts boiling at the atmospheric pressure is known as its boiling point. Boiling is a bulk phenomenon. Particles from the bulk of the liquid gain enough energy to change into the vapour state. A change of state directly from solid to gas without changing into liquid state is called sublimation and the direct change of gas to solid without changing into liquid is called deposition.
$i.)$ A change of state directly from solid to gas without changing into liquid state is called
$a.)$ Sublimation
$b.)$ Deposition
$c.)$ Boiling point
$d.)$ None of these
$ii.)$ The direct change of gas to solid without changing into liquid is called
$a.)$ Sublimation
$b.)$ Deposition
$c.)$ Boiling point
$d.)$ None of these
$iii.)$ The energy supplied by heat to solid is used to overcome the forces of attraction between the particles. True or false
$a.)$ True
$b.)$ False
$c.)$ None of these
$iv.)$ Define melting point and boiling point
$v.)$ Define latent heat of fusion
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Q 43Case study ( 4 Marks )4 Marks
There are three states of matter – solid, liquid and gas.
Solids have a definite shape, distinct boundaries and fixed volumes, that is, have negligible compressibility. Solids have a tendency to maintain their shape when subjected to outside force. Solids may break under force but it is difficult to change their shape, so they are rigid.
Liquids have no fixed shape but have a fixed volume. They take up the shape of the container in which they are kept. Liquids flow and change shape, so they are not rigid but can be called fluid.
Gas as has indefinite shape, no fixed volume. Gas gets the shape and volume of container.
Gas has very low density hence are light. Gas can flow easily and hence are called fluid.
$i.)$ Which of the following state of matter takes shape of container in which it is filled?
$a.)$ Solid
$b.)$ Liquid
$c.)$ Gas
$d.)$ Both $b$ and $c$
$ii.)$ Distance between particles of matter least in
$a.)$ Solid
$b.)$ Liquid
$c.)$ Gas
$d.)$ None of these
$iii.)$ Compressibility is least in case of
$a.)$ Solid
$b.)$ Liquid
$c.)$ Gas
$d.)$ None of these
$iv.)$ Give properties of solids.
$v.)$ Give properties of Gases.
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Q 44Case study ( 4 Marks )4 Marks
A matter is anything that has mass and occupies space. Pen, paper, clips, sand, air, ice, etc. are different forms of matter. Every matter is made up of small particles. These particles are so tiny that they can’t be seen with naked eyes. Let’s see about the different characteristics of particles of matter.
  • All matter is made up of very small particles.
  • .Particles of matter has spaces between them.
  • Particles of matter are continuously moving.
  • Particles of matter attract each other.
Answer the following questions by referring above paragraph.
$i.)$ Which of following is not matter?
$a.)$ Pen
$b.)$ air
$c.)$ smell of perfume
$d.)$ None of these
$ii.)$ Thoughts coming in our mind are example of matter. True or false
$a.)$ True
$b.)$ False
$c.)$ None of these
$iii.)$ Which of the following is true about particles of matter?
$a.)$ Particles of matter has spaces between them
$b.)$ Particles of matter are continuously moving
$c.)$ Particles of matter attract each other
$d.)$ All of these
$iv.)$ Give 5 examples of matter in our surroundings
$v.)$ Enlist all properties of particles of matter
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