Question

The volume of oxygen obtained by the decomposition of 4 g of $O_3$ at STP is :

• A. 3 L
• B. 9 L
• C. 6 L
• D. 2 L

Answer 1

The correct option is C 6 L

The decomposition reaction of ozone gas,

$2O_3\left(g\right)\to 3O_2\left(g\right)$

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