On heating which of the following releases $C O_{2}$ most easily?

$N a_{2} C O_{3}$

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$C a C O_{3}$

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$M g C O_{3}$

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$K_{2} C O_{3}$

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Solution

The correct option is C
$M g C O_{3}$

As we go down the group, the thermal stability of the carbonates increases. Among the carbonates from the same period, the alkali metal carbonate tends to be more stable.

This could be better explained by the hard-soft-acid-base theory. Watch the video for more details.

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