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Question 600037
JEE Chemistry · Hard

Mole Concept and Stoichiometry: Limiting Reagent MCQ

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Limiting ReagentHardQuestion 600037

Question

In CH₄ + 2O₂ → CO₂ + 2H₂O, if 32 g CH₄ and 96 g O₂ are taken, which is limiting and how much CO₂ forms?
  1. A
    CH₄ limits; 88 g CO₂
    Correct
  2. B
    O₂ limits; 66 g CO₂
  3. C
    CH₄ limits; 44 g CO₂
  4. D
    Both consumed equally; 88 g CO₂

Correct answer

CH₄ limits; 88 g CO₂

Explanation

n(CH₄) = 2 mol, n(O₂) = 3 mol. Need 2×2 = 4 mol O₂ for 2 mol CH₄, but only 3 mol available → O₂ limits. From 3 mol O₂: 3/2 = 1.5 mol CO₂. Mass = 1.5 × 44 = 66 g CO₂. Correct answer: O₂ limits; 66 g CO₂.

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