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Matter in Our Surroundings

Description: Chemistry, Matter in our Surroundings, IX
Number of Questions: 15
Created by:
Tags: Chemistry Matter Solid Liquid Gas Plasma Sublimation Evaporation Fusion Diffusion Particles of Matter IX Class Plotting of Points Plotting Points Using X -Y Axis to Identity Position Using x-y Axis to Identify Positions Identification of Quadrants Properties of Matter Particle Model of Matter Sublimation, Sublime & Sublimate
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Which of the following statements is/are correct?

a. The energy supplied to the particles during heating is used to overcome the forces of attraction. b. A gas is liquefied by applying high pressure and increasing the temperature. c. Gaseous state of ammonia at room temperature is an example of vapour.

  1. Only a

  2. Only b

  3. Only c

  4. Only a and c

  5. Only b and c

Show answer
Correct Option: A
Explanation:

This statement is correct. Thus, this option is the correct answer.

Which of the following statements is correct?

  1. Gases have no open surface.

  2. There is extreme attraction between gaseous particles.

  3. Inter-molecular force is maximum in gases.

  4. Gases can flow from higher levels to lower levels and are thus, called fluids.

  5. Gases have rigidity and compressibility.

Show answer
Correct Option: A
Explanation:

This is correct. Gases have no open surface. In gases, the inter-molecular forces of attraction are very weak. Hence, the particles move without any restriction in random motion. These thus, occupy any available space and move away if there is an open space. That is why gases do not have any open surface.

The intermixing of particles of two substances on their own is known as which of the following processes?

  1. Solidification

  2. Diffusion

  3. Condensation

  4. Liquification

  5. Fusion

Show answer
Correct Option: B
Explanation:

The intermixing of particles of two substances on their own is known as diffusion.

Which of the following is the transition of a substance directly from the solid to the gas phase, without passing through an intermediate liquid phase?

  1. Evaporation

  2. Solidification

  3. Condensation

  4. Sublimation

  5. Diffusion

Show answer
Correct Option: D
Explanation:

Sublimation is the process where a solid is directly formed from the gas. It  is the transition of a substance directly from the solid to the gas phase without passing through an intermediate liquid phase.

Which of the following substances has the maximum order of attraction between the particles?

  1. Milk

  2. Kerosene oil

  3. Salt

  4. Methane

  5. Propane

Show answer
Correct Option: C
Explanation:

Salt has the maximum order of attraction between the particles.

Which of the following properties is not a characteristic of liquids?

  1. Diffusion

  2. Definite volume

  3. Definite shape

  4. Compressibility

  5. Fluidity

Show answer
Correct Option: C
Explanation:

Liquids do not have a shape of their own. They can take the shape of the container.

Which of the following substances has an open surface and definite boundaries?

  1. Water

  2. Nitrogen

  3. Oxygen

  4. CNG

  5. Sponge

Show answer
Correct Option: E
Explanation:

Solids have an open surface with definite boundaries.

Which of the following does not have plasma?

  1. Sun

  2. Stars

  3. Hotel sign containing neon gas

  4. Fluorescent tube containing helium gas

  5. Oxygen tank

Show answer
Correct Option: E
Explanation:

Oxygen tanks do not have plasma.

Which of the following statements is/are incorrect? a. Latent heat of fusion is the amount of heat energy required to change 1 kg of a liquid into gas at atmospheric pressure at its melting point. b. Humidity decreases the rate of evaporation. c. Gases have the weakest inter-molecular forces.

  1. Only a

  2. Only b

  3. Only c

  4. Only a and b

  5. Only b and c

Show answer
Correct Option: A
Explanation:

This is the correct option, as this statement is incorrect. Latent heat of fusion is the amount of heat energy required to change 1 kg of a solid into liquid at atmospheric pressure at its melting point.

Which of the following substances follow the process of sublimation?

  1. Ice

  2. Salt

  3. Sugar

  4. Mustard oil

  5. Camphor

Show answer
Correct Option: E
Explanation:

Camphor has the property of sublimation. Thus, even at room temperature it evaporates.

Which of the following is an example of diffusion?

  1. Sponge soaking up water.

  2. Sprinkling water on plants.

  3. Naphthalene balls disappearing in air after leaving uncovered for a while.

  4. Spraying perfume in air.

  5. Wax melting in the sun.

Show answer
Correct Option: D
Explanation:

The intermixing of particles of two substances on their own is known as diffusion. Here, the particles of perfume spray mix in the air in the room and the whole room begins to smell nice. This is diffusion.

Which of the following statements is/are correct? a. The space in between the constituent particles and kinetic energy of the particles are minimum in the case of solids. b. The state of matter can be changed by changing temperature or pressure. c. Evaporation causes cooling.

  1. Only a

  2. Only b

  3. Only c

  4. Only a and c

  5. All of these

Show answer
Correct Option: E
Explanation:

This option is correct because all the statements are correct. 

Which of the following statements is/are incorrect? a. Boiling is a bulk phenomenon. b. Evaporation is a surface phenomenon. c. Rate of evaporation decreases with speed of wind.

  1. Only a

  2. Only b

  3. Only c

  4. Only a and c

  5. Only b and c

Show answer
Correct Option: C
Explanation:

More particles of liquid vapour can be carried away with more wind. Thus, rate of evaporation increases with the speed of wind.

Match the following columns ||| |---|---| | Quantity| Unit| |A. Temperature|1. Newton| |B. Weight|2. Pascal| |C. Pressure|3. Kelvin|

  1. A-1, B-2, C-3

  2. A-2, B-1, C-3

  3. A-3, B-2, C-1

  4. A-3, B-1, C-2

  5. A-1, B-3, C-2

Show answer
Correct Option: D
Explanation:

This is the correct matching. The unit of temperature is kelvin. The unit of weight is newton. The unit of pressure is pascal.

Which of the following are the various states of matter? a. Solid b. Liquid c. Gas d. Plasma e. Bose Einstein condensate

  1. Only a and b

  2. Only a, b and c

  3. Only a, b, c and d

  4. All of these

  5. Only a, b, c and e

Show answer
Correct Option: D
Explanation:

Yes, it is the correct answer, as all  of these are  different states of matter. Apart from solid, liquid and gas plasma and BEC are also forms of matter. The plasma state consists of super energetic and super excited particles. These particles are in the form of ionised gases. The BEC is formed by cooling a gas of extremely low density, about one-hundred-thousandth the density of normal air, to super low temperatures.

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