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Question 600030
JEE Chemistry · Medium

Mole Concept and Stoichiometry: Stoichiometry MCQ

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StoichiometryMediumQuestion 600030

Question

How many grams of H₂O are produced when 4 g of H₂ reacts completely with excess O₂? (2H₂ + O₂ → 2H₂O)
  1. A
    18 g
  2. B
    36 g
    Correct
  3. C
    9 g
  4. D
    72 g

Correct answer

36 g

Explanation

n(H₂) = 4/2 = 2 mol. From stoichiometry: 2 mol H₂ → 2 mol H₂O. Mass = 2 × 18 = 36 g.

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