Q.

The decomposition temperature of BaCO3 (A), MgCO3 (B) and CaCO3 (C) follow the order

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a

C > A > B

b

A > C > B

c

C > B > A

d

B > C > A

answer is B.

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Detailed Solution

As size of metal increases stability of carbonate increasesSince a larger size cation will stabilise the large size anion Therefore, greater the stability greater will be decomposition temperatureDecomposition temperature order:
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