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Reactivity Trends (Group 2)

MgCO3 is ther...

Question

$M g C O_{3}$ is thermally more stable than $C a C O_{3}$ .
If true enter 1, else enter 0.

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Solution

$C a C O_{3}$ is more stable than $M g C O_{3}$ because thermal stability of carbonates of group-2 increases down the group with increase in the size of cation. This is because larger cation stabilizes the larger carbonate ion more.
Hence, the statement is true.

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N a_{2} C O_{3}

is thermally stable but

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, both decompose on heating.
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The oppositely charged ion pair is more stable than the separated ions.

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