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Polarisability and Fajan's Rule

Na2CO3 does n...

Question

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

A

Higher cation charge

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B

Presence of Oxygen

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C

Lower anion charge

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D

Insufficient data

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Solution

The correct option is A
Higher cation charge

In both the compounds, more the polarizing power, easier is the decomposition reaction. Calcium having +2 charges has more polarizing power. Thus $C a C O_{3}$ decomposes.

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

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