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Question 600090
JEE Chemistry · Hard

Mole Concept and Stoichiometry: Stoichiometry MCQ

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StoichiometryHardQuestion 600090

Question

Na₂O₂ reacts with water: 2Na₂O₂ + 2H₂O → 4NaOH + O₂. 15.6 g Na₂O₂ (M=78) gives how many litres of O₂ at STP?
  1. A
    1.12 L
  2. B
    2.24 L
    Correct
  3. C
    4.48 L
  4. D
    0.56 L

Correct answer

2.24 L

Explanation

15.6 g Na₂O₂ is 0.2 mol. The equation gives 0.1 mol O₂, which occupies 0.1×22.4=<strong>2.24 L</strong>0.1×22.4=<strong>2.24\text{ L}</strong> at STP.

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