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Q.

4.54 L $O_{2}$ gas at STP is liberated from all $H_{2} O_{2}$ Present in 200 ml $H_{2} O_{2}$ solution. The molarity (in mol/litre) of $H_{2} O_{2}$ solution is:

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answer is 2.

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Detailed Solution

$H_{2} O_{2} (l) ⟶ H_{2} O (l) + \frac{1}{2} O_{2} (g)$

0.4 mole 0.2mole

$Molarity = \frac{0.4}{200} \times 1000 = 2 M$

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