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Preparation and Properties of Potassium Carbonate

Thermal stabi...

Question

Thermal stability of the carbonates is in order :

A

M g C O_{3} < C a C O_{3} < B a C O_{3}

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B

B a C O_{3} < C a C O_{3} < M g C O_{3}

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C

M g C O_{3} < B a C O_{3} < C a C O_{3}

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D

C a C O_{3} < B a C O_{3} < M g C O_{3}

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Solution

The correct option is C $M g C O_{3} < C a C O_{3} < B a C O_{3}$
As we move down the group the stability of metal carbonates increases as the size of metal atom increases leading to the formation of strong ionic bond.

The correct order of thermal stability of carbonates:

$M g C O_{3} < C a C O_{3} < B a C O_{3}$ .

Hence option A is correct.

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