Among the carbonates of alkali metals which one has highest stability?

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Rb₂CO₃

Cs₂CO₃

K₂CO₃

Na₂CO₃

answer is A.

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Detailed Solution

Metal carbonates become more stable as we move down the group. In order to disintegrate, the heavier compounds near the bottom require less heat than the larger compounds. Therefore, compared to the other carbonates, Cs₂CO₃ has the highest thermal stability.

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