Question

$N{a}_{2}C{O}_3$ does not decompose on heating where as $CaC{O}_3$ decomposes. Why?

• A. Higher cation charge
• B. Presence of Oxygen
• C. Lower anion charge
• D. Insufficient data

Answer 1

The correct option is A

Higher cation charge

In both the compounds, more the polarizing power, easier is the decomposition reaction. Calcium having +2 charges has more polarizing power. Thus $CaC{O}_3$ decomposes.