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MCQ on Class 9 Matter in our Surroundings

Last updated on August 30th, 2023 at 01:45 am

Class 9 Matter in our Surroundings MCQ

 

According to ancient Indian philosophers, what were the five basic elements that made up everything?

  1. a) Air, earth, fire, sky, and water
  2. b) Metal, wood, water, fire, and earth
  3. c) Oxygen, carbon, hydrogen, nitrogen, and sulfur
  4. d) Gold, silver, copper, iron, and zinc

Answer: a) Air, earth, fire, sky, and water

 

What are the two characteristics that all things in the universe possess?

  1. a) Mass and weight
  2. b) Volume and weight
  3. c) Mass and density
  4. d) Mass and volume

Answer: d) Mass and volume

 

What happens to the kinetic energy of particles as the temperature increases?

  1. a) It decreases
  2. b) It remains constant
  3. c) It fluctuates
  4. d) It increases

Answer: d) It increases

 

What is diffusion?

  1. a) The movement of particles in a straight line
  2. b) The separation of particles in a substance
  3. c) The intermixing of particles of different types of matter
  4. d) The transformation of matter from solid to gas

Answer: c) The intermixing of particles of different types of matter

 

What effect does heating have on the speed of diffusion?

  1. a) It slows down diffusion
  2. b) It has no effect on diffusion
  3. c) It stops diffusion completely
  4. d) It increases the speed of diffusion

Answer: d) It increases the speed of diffusion

 

Which factor determines the rate of diffusion?

  1. a) Temperature
  2. b) Volume
  3. c) Mass
  4. d) Density

Answer: a) Temperature

 

What is the main cause of diffusion?

  1. a) Gravity
  2. b) Chemical reactions
  3. c) Particle size
  4. d) Random motion of particles

Answer: d) Random motion of particles

 

What happens to the kinetic energy of particles in a solid as the temperature increases?

  1. a) It decreases
  2. b) It remains constant
  3. c) It fluctuates
  4. d) It increases

Answer: d) It increases

 

What effect does an increase in kinetic energy have on the particles in a solid?

  1. a) They move slower
  2. b) They vibrate more slowly
  3. c) They leave their fixed positions and move more freely
  4. d) They become tightly packed

Answer: c) They leave their fixed positions and move more freely

 

What is the minimum temperature at which a solid melts to become a liquid called?

  1. a) Boiling point
  2. b) Freezing point
  3. c) Melting point
  4. d) Condensation point

Answer: c) Melting point

 

What causes a solid to melt and become a liquid?

  1. a) Decrease in temperature
  2. b) Increase in pressure
  3. c) Increase in kinetic energy of particles
  4. d) Decrease in volume

Answer: c) Increase in kinetic energy of particles

 

What happens to the temperature of a system during the process of melting?

  1. a) It decreases
  2. b) It remains constant
  3. c) It fluctuates
  4. d) It increases

Answer: b) It remains constant

 

Where does the heat energy go when a solid melts and its temperature remains constant?

  1. a) It is released into the surroundings
  2. b) It is converted into kinetic energy of the particles
  3. c) It is used to overcome the forces of attraction between the particles
  4. d) It is lost and cannot be accounted for

Answer: c) It is used to overcome the forces of attraction between the particles

 

What is the term used to describe the heat energy absorbed during the process of melting without causing a rise in temperature?

  1. a) Hidden heat
  2. b) Sensible heat
  3. c) Latent heat
  4. d) Thermal energy

Answer: c) Latent heat

 

What does the latent heat of fusion represent?

  1. a) The amount of heat energy required to change the state of a substance from solid to gas
  2. b) The amount of heat energy required to change the state of a substance from liquid to gas
  3. c) The amount of heat energy required to change 1 kg of a solid into a liquid at atmospheric pressure at its melting point
  4. d) The amount of heat energy required to change the state of a substance from gas to solid

Answer: c) The amount of heat energy required to change 1 kg of a solid into a liquid at atmospheric pressure at its melting point

 

What happens to the particles of water when heat energy is supplied to it?

  1. a) They slow down
  2. b) They stop moving
  3. c) They start moving faster
  4. d) They change their shape

Answer: c) They start moving faster

 

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