Question

$60$ L of pure dry $O_2$ is subjected to silent electric discharge. If only $10\%$ of it is converted to ozone, then volume of $O_3$ formed is:

• A. $4$ L
• B. $6$ L
• C. $40$ L
• D. $3$ L

Answer 1

The correct option is A $4$ L

$3O_2\to 2O_3$
$3$ moles of oxygen give two moles of ozone.
Only $10\%$ of oxygen is converted to ozone, thus, $22.4\times 3$ litres of oxygen will give $22.4\times 2\times 0.1$ litres ozone.
Hence, $60$ litres of oxygen will form $60\times \frac{22.4\times 2\times 0.1}{22.4\times 3}=4$ litres of ozone.