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Matter in Our Surroundings

Science · Class 9 · All

ScienceClass 9AllMedium
Q1/14
45s

The process in which a solid changes directly into a gas is called

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All 14 questions in this quiz

  1. Which statement about boiling is correct?

    1. Boiling occurs only at the surface of the liquid.
    2. Boiling occurs throughout the liquid at a fixed temperature called the boiling point.
    3. Boiling takes place only in solids.
    4. Boiling does not require heat.

  2. Which of the following has the strongest force of attraction between its particles?

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

  3. Why does sweating cool the body?

    1. Sweat increases body temperature.
    2. Sweat reflects sunlight.
    3. Sweat evaporates by absorbing heat from the body.
    4. Sweat blocks air from reaching the skin.

  4. Which process converts gas into liquid?

    1. Sublimation
    2. Condensation
    3. Melting
    4. Freezing

  5. During melting, a substance absorbs heat known as

    1. Latent heat of fusion
    2. Latent heat of vaporization
    3. Specific heat
    4. Heat capacity

  6. Which factor increases the rate of evaporation?

    1. High humidity
    2. Low temperature
    3. Larger surface area
    4. Still air

  7. The process of converting a liquid into vapour at any temperature below its boiling point is called

    1. Boiling
    2. Evaporation
    3. Freezing
    4. Melting

  8. The process in which a solid changes directly into a gas is called

    1. Melting
    2. Condensation
    3. Sublimation
    4. Freezing

  9. Which state of matter can be compressed easily?

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

  10. Which state of matter has a definite volume but no definite shape?

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

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

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

  12. The process by which particles of one substance mix with another on their own is called

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

  13. Which of the following is NOT a characteristic of particles of matter?

    1. They have spaces between them.
    2. They are continuously moving.
    3. They attract each other.
    4. They are visible to the naked eye.

  14. Which of the following best defines matter?

    1. Anything that produces light
    2. Anything that occupies space and has mass
    3. Anything that can move
    4. Anything that produces sound