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MHT CET202618 April 2026Morning ShiftChemistrySome Basic Concepts of ChemistryActual

How many moles of potassium chlorate are heated to produce 22.4 lit of oxygen at STP ?

Options

  1. A1 2 mole
  2. B1 3 mole
  3. C1 4 mole
  4. D2 3 mole

Correct answer

D. 2 3 mole

Step-by-step solution

The balanced chemical equation for the thermal decomposition of potassium chlorate is: 2KClO₃ 2KCl + 3O₂ At STP, 22.4 lit of oxygen gas corresponds to 1 mole of O₂ . From the stoichiometry of the reaction, 3 moles of O₂ are produced by heating 2 moles of KClO₃ . Therefore, the number of moles of KClO₃ required to produce 1 mole of O₂ is 2 3 mole . Answer: 2 3 mole

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