Comment on the following statements: (a) Evaporation produces cooling. (b) Rate of evaporation of an aqueous solution decreases with increase in humidity. Sponge though compressible is a solid.
ScienceClass 9CBSEAnswered 27 Mar 2026
Answer
- Soln:
- When liquid evaporates it takes latent heat from the object it This will make the object gets cool. Hence evaporation causes cooling.
- When there is increase in the humidity water vapours in the atmosphere will be Hence atmosphere will not take water vapours easily which decreases the process of evaporation.
- Sponge is a solid because it has definite shape and volume which does not change until you press It has minute pores in which air is filled. When you press air passes out through pores this makes it a compressible solid.
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