Question

Q.20. Give an example of thermal dissociation
reaction.​

Answer 1

Answer:

Some oxides, especially of weakly electropositive metals decompose when heated to high enough temperature. A classical example is the decomposition of mercuric oxide to give oxygen and mercury metal. The reaction was used by Joseph Priestley to prepare samples of gaseous oxygen for the first time.

a chemical reaction in which a substance decomposes reversibly when the temperature is raised. A substance undergoing thermal dissociation may form several substances (2H2O ⇄ 2H2 + O2, CaCO3 ⇄ CaO + CO2) or a single, simpler substance (N2O4 ⇄ 2NO2, Cl2 ⇄ 2C1).

Explanation:

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Answer 2

Answer:

A substance undergoing thermal dissociation may form several substances (2H2O ⇄ 2H2 + O2, CaCO3 ⇄ CaO + CO2) or a single, simpler substance (N2O4 ⇄ 2NO2, Cl2 ⇄ 2C1).

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