Multiple choice

A glass bulb contains 2.24 L of H2 and 1.12 L of D2 at STP. It is connected to a fully evacuated bulb by a stop-cock with a small opening. The stop-cock is opened for sometime and then closed. The first bulb now contains 0.10 g of $H_2$. The percentage of $ H_{2}$ in the mixture is

  1. $41.6\%$
  2. $58.4\%$
  3. $41.2\%$
  4. $50\%$
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A Correct answer

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