Assertion . Li_(2)CO_(3) and Na_(2)CO_(3) are thermally stable. Reason . Both the carbonates are salts of large cations and large anions .

Assertion . Li_(2)CO_(3) and Na_(2)CO_(3) are thermally stable. Reaso

1.	Assertion . Li_(2)CO_(3) and Na_(2)CO_(3) are thermally stable. Reason . Both the carbonates are salts of large cations and large anions .
Answer» If both assertion and REASON are true, and reason is the true explanation of the assertion. If both assertion and reason are true, but reason is not the true explanation of the assertion. If assertion is true, but reason is false If both assertion and reason are false. Solution :Correct assertion . `Li_(2)CO_(3)` is unstable and decompose on heating to FORM `Li_(2)O` and `CO_(2)` but `Na_(2)CO_(3)` is thermally STABLE . Correct reason . `Li_(2)CO_(3)` is thermally unstable because it is SALT of a small cation and big anion . In contrast , `Na_(2)CO_(3)` is thermally stable because a bigger cation stabilizes a bigger anion .