Q62 / 160 · JIPMER 2014 · Chemistry
Among the following the least thermally stable is
- A$\mathrm{K}_2 \mathrm{CO}_3$
- B$\mathrm{Na}_2 \mathrm{CO}_3$
- C$\mathrm{BaCO}_3$
- Correct answerD$\mathrm{Li}_2 \mathrm{CO}_3$
Solution
Thermal stability of carbonates increases on moving down a group. Thus, lithium carbonate, $\mathrm{Li}_2 \mathrm{CO}_3$ is least thermally stable.
$\mathrm{Li}_2 \mathrm{CO}_3 \xrightarrow{\Delta} \mathrm{Li}_2 \mathrm{O}+\mathrm{CO}_2$
Hence, the correct answer is option: 'D'.