Question

The metallic oxide of a divalent metal which on thermal decomposition liberates oxygen is:

• A. $C{O}_2$
• B. $P_2{O}_5$
• C. $HgO$
• D. $N_{2}O$

Answer 1

Answer: (C)

Mercuric Oxide on thermal decomposition gives $Hg$ and $O_2$

$2HgO$ $\to$ $2Hg+O_2\uparrow$