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KVPY2017ChemistrySome Basic Concepts of Chemistry

In a closed vesselat STP, 50 L of CH ₄ is ignited with 750 ~L of air (containing .20 % O ₂ ) . The number of moles of O ₂ remaining in the vessel on cooling to room temperature is closest to

Options

  1. A5.8
  2. B2.2
  3. C4.5
  4. D6.7

Correct answer

B. 2.2

Step-by-step solution

array l CH ₄+2 O ₂ CO ₂+2 H ₂ O 50 ~L 150 ~L array CH ₄ is limiting reagent Moles of O ₂ remaining = 50 22.4 =2.2 moles

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