Which of the following is a decomposition reaction but not an electrolytic decomposition reaction?
Answer and explanation
Correct answer: Decomposition of lead nitrate on heating
On heating, lead nitrate undergoes thermal decomposition: \(2\mathrm{Pb(NO_3)_2} \xrightarrow{\Delta} 2\mathrm{PbO} + 4\mathrm{NO_2} + \mathrm{O_2}\). The energy is supplied by heat, not by electric current, so it is not electrolytic decomposition. In contrast, acidified water in A, molten sodium chloride in B, and copper chloride solution in C decompose because of electric current.
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What is the correct answer to this question?
Decomposition of lead nitrate on heating
Why is this the correct answer?
On heating, lead nitrate undergoes thermal decomposition: \(2\mathrm{Pb(NO_3)_2} \xrightarrow{\Delta} 2\mathrm{PbO} + 4\mathrm{NO_2} + \mathrm{O_2}\). The energy is supplied by heat, not by electric current, so it is not electrolytic decomposition. In contrast, acidified water in A, molten sodium chloride in B, and copper chloride solution in C decompose because of electric current.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
