The volume of oxygen obtained by the decomposition of 4 g of $O_{3}$ at STP is :

3 L

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9 L

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6 L

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2 L

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Solution

The correct option is C 6 L
The decomposition reaction of ozone gas,
$2 O_{3} (g) \to 3 O_{2} (g)$
So it is clear that 2 volume of ozone liberates 3 volume of oxygen gas.
So 4 L of ozone will liberate=4 $\times$ 3/2 L
=6 L. So the correct option is C

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