Which of the following does not give an oxide on heating?

M g C O_{3}

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{L i}_{2} C O_{3}

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Z n C O_{3}

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None of the above

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Solution

The correct option is C None of the above
On thermal decomposition:
$M g C O_{3} \to M g O + C O_{2}$
${L i}_{2} C O_{3} \to L i_{2} O + C O_{2}$
$Z n C O_{3} \to Z n O + C O_{2}$
All of the above compounds gives oxides.
Hence option D is correct.

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