NEET Chemistry The s-Block Elements Questions Solved

Assertion :  As the electropositive character increases down the group, the stability of carbonates and hydrogen carbonates of alkali metals increases.

Reason :  Lithium carbonates is not so stable to heat : lithium being very small in size polarises a large CO3-2 ion leading to the formation of more stable Li2O and CO2

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(B). (i) Bigger cation stabilises bigger anions and vice-versa.

(ii) Alkali metal carbonates and their bicarbonates stability of their oxides to which they are converted.

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