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) $B a C O_{3}$

Q. Assuming fully decomposed, the volume of

C O_{2}

released at STP on heating

9.85 g

B a C O_{3}

(atomic mass,

B a = 137

) will be:

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Which of the following cannot decompose on heating to give CO2 ?

The correct option is A Na2CO3Anhydrous sodium carbonate is stable to heat and does not decompose even when it is heated to redness. This is because sodium carbonate salt on heating with acids react to release carbon dioxide.

Which of the following cannot decompose on heating to give $C O_{2}$ ?

The correct option is A $N a_{2} C O_{3}$
Anhydrous sodium carbonate is stable to heat and does not decompose even when it is heated to redness. This is because sodium carbonate salt on heating with acids react to release carbon dioxide.