Matter in Our Surroundings MCQ Quiz

8 questions

1. Which state of matter has a definite shape and a definite volume?

   1. Gas
   2. Liquid
   3. Solid
   4. Plasma

2. Changing directly from solid to gas without passing through the liquid state is called:

   1. Evaporation
   2. Sublimation
   3. Condensation
   4. Fusion

3. What is the SI unit of temperature?

   1. Celsius
   2. Fahrenheit
   3. Kelvin
   4. Joule

4. The rate of diffusion is fastest in which state of matter?

   1. Solids
   2. Liquids
   3. Gases
   4. It is the same in all states

5. 0°C is equal to how many Kelvin?

   1. 0 K
   2. 100 K
   3. 273 K
   4. 373 K

6. What causes the cooling effect during evaporation?

   1. Particles with higher energy escape, leaving behind particles with lower average energy
   2. Particles gain energy from the surroundings
   3. Pressure increases at the surface
   4. The volume of the liquid decreases

7. Which factor does NOT affect the rate of evaporation?

   1. Temperature
   2. Surface area
   3. Humidity
   4. Colour of the liquid

8. LPG and CNG are stored as liquids under high pressure because:

   1. Increasing pressure (and lowering temperature) can liquefy gases
   2. Gases turn solid under any pressure
   3. Pressure has no effect on the state of a gas
   4. Liquids always turn into gases under pressure

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