The carbonate that will not decompose heating is :

{N a}_{2} C O_{3}

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C a C O_{3}

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B a C O_{3}

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S r C O_{3}

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Solution

The correct option is B ${N a}_{2} C O_{3}$
All alkali metal (IA group) carbonates (expect $L i_{2} C O_{3}$ ) are highly stable and do not decompose on heating.

Carbonates of alkaline earth metal (IIA group) decompose into $C O_{2}$ and metal oxide when heated.

Therefore, $N a_{2} C O_{3}$ will not decompose on heating.

Hence, option $A$ is correct.

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Similar questions

Q. The thermal stability of alkaline earth metal carbonates–

M g C O_{3}, C a C O_{3}, S r C O_{3}

and

B a C O_{3}

, follows the order:

Q. The thermal stability of

B a C O_{3}, C a C O_{3}, S r C O_{3}

and

M g C O_{3}

decreases in the order

Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal Carbonates is most stable thermally?
(a) $M g C O_{3}$ (b) $C a C O_{3}$ (c) $S r C O_{3}$ (d) $B a C O_{3}$

$N a_{2} C O_{3}$ does not decompose on heating where as $C a C O_{3}$ decomposes. Why?

Q. Decomposition temperature of

C a C O_{3}

(s) is approximately

900^{0} C

. Which of the following decompose below

900^{0} C

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