Question

A mixture contains $2$ moles of $N{a}_{2}C{O}_3$ and $1$ mole of $L{i}_{2}C{O}_3$. The volume (in litres) of $C{O}_2$ formed on heating this mixture at STP is :

• A. $11.2$
• B. $22.4$
• C. $33.6$
• D. $44.8$

Answer 1

The correct option is B $22.4$

$N{a}_{2}C{O}_3$ is thermally stable. Therefore, when the mixture containing $2$ moles of $N{a}_{2}C{O}_3$ and $1$ mole of $L{i}_{2}C{O}_3$ is heated, only $L{i}_{2}C{O}_3$ decomposes at $STP.$

The reaction is as follows:

$L{i}_{2}C{O}_3\to L{i}_{2}O+C{O}_2$

So, $1$ mole of $L{i}_{2}C{O}_3$ decomposes to give $1$ mole of $C{O}_2$. So, the volume occupied by $1$ mole of $C{O}_2$ at $STP$ is $22.4$ L.

Hence, the correct option is $B$