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Question: Answered & Verified by Expert
In the thermal decomposition of potassium chlorate given as $2 \mathrm{KClO}_3 \longrightarrow 2 \mathrm{KCl}+3 \mathrm{O}_2$, law of mass action
ChemistryChemical EquilibriumJEE Main
Options:
  • A Cannot be applied
  • B Can be applied
  • C Can be applied at low temperature
  • D Can be applied at high temp. and pressure
Solution:
2592 Upvotes Verified Answer
The correct answer is: Cannot be applied
The thermal decomposition of potassium chlorate is an irreversible reaction which takes place only in the forward direction. Law of mass action can only be applied for reversible reactions.
Hence, the law of mass action is not applicable in this case.

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