Which of the following carbonates do not give metal oxide on heating ?

C u C O_{3}

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K_{2} C O_{3}

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N a_{2} C O_{3}

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M g C O_{3}

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Solution

The correct options are
A $K_{2} C O_{3}$
C $N a_{2} C O_{3}$
Only $K_{2} C O_{3}$ and $N a_{2} C O_{3}$ does not give the metal oxide on heating.

$A : C u C O_{3} \to C u O + C O_{2}$
$B : K_{2} C O_{3} \to$ no reaction
$C : N a_{2} C O_{3} \to$ no reaction
$D : M g C O_{3} \to M g O + C O_{2}$
So others can give the metal oxide and $C O_{2}$ on heating but $N a_{2} C O_{3}$ and $K_{2} C O_{3}$ cannot.

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Similar questions

Q. Which of the following does not give metal oxide on heating

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Q. Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal carbonates is most stable thermally?

Carbonate of which of the following element will give stable oxide on heating?

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. Increasing order of stability of-
I.

K_{2} C O_{3}

II.

M g C O_{3}

III

N a_{2} C O_{3}

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Which of the following carbonates do not give metal oxide on heating ?

The correct options are A K2CO3 C Na2CO3Only K2CO3 and Na2CO3 does not give the metal oxide on heating. A:CuCO3→CuO+CO2 B:K2CO3→ no reaction C:Na2CO3→ no reactionD:MgCO3→MgO+CO2 So others can give the metal oxide and CO2 on heating but Na2CO3 and K2CO3 cannot.