Question

Sodium oxalate on heating with conc $H_{2}S{O}_4$ gives

• A. $CO$ only
• B. $CO$ and $C{O}_2$
• C. $C{O}_2$ only
• D. $S{O}_2$ and $S{O}_3$

Answer 1

The correct option is B

$CO$ and $C{O}_2$

First, the the oxalate is converted to oxalic acid, which gets dehydrated. So overall, sodium oxalate reacts with conc. $H_{2}S{O}_4$ to form $CO$ and $C{O}_2$ gas:

$\left(COOH{)}_2\underset{H_{2}S{O}_4}{\overset{\Delta }{\to }}CO\right(g)+C{O}_2+H_{2}O$