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Why do substances undergo change in phys...

Why do substances undergo change in physical state ?

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Substances undergo change in physical state because both interparticle spaces and interparticle forces can be changed by changing the conditions of temperature and pressure.
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DINESH PUBLICATION-MATTER IN OUR SURROUNDINGS -Very Short Answer Questions
  1. Why do not solids possess fluidity ?

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  2. A certain substance 'A' cannot be compressed but takes up the shape of...

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  3. Why do substances undergo change in physical state ?

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  4. What is the pressure at sea level ?

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  5. Are the melting point temperature of the solid state and the freezing ...

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  6. Why are gases highly compressible ?

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  7. A substance is in liquid state at room temperature and changes into ga...

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  8. When a crystal of copper sulphate is placed at the bottom of a beaker ...

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  9. Why do solids generally lack the property of diffusion ?

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  10. Do we represent the temperature on kelvin scale by the letter 'k' or '...

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  11. The boiling point of alcohol is 78^(@)C. What is this temperature on K...

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  12. When a solid starts melting, its temperature does not rise till whole ...

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  13. A substance upon heating directly changes into gaseous state. What is ...

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  14. Define gaseous state of a substance.

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  15. Represent freezing and boiling temperature of water in Celsius as well...

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  16. Does the evaporation of a liquid occur only at a fixed temperature ?

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  17. What is the name given to the process when the vapours of a liquid get...

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  18. Does the temperature of liquid increase further when it starts boiling...

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  19. Why do we sweat more in a humid day ?

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  20. How does pressure help in the liquefication of a gas ?

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