Question

Give two examples of the substances which do not change their state on heating.

Answer 1

Answer:

On heating a solid such as ice turns into water i.e liquid and that converts into water vapour/gas.

Gas/Vapours turn to liquid by contracting due to condensation, but on heating their physical state cannot reverse back into solid or liquid.

Hence, a gas on heating will remain a gas itself as it expands.

Furthermore, answer to your question is all gases like oxygen O₂, carbon dioxide CO₂, Hydrogen H₂, etc.

Answer 2

Explanation:

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