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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Solution

The correct option is A IIf more than two types of atoms are present then,
thermal stability $\propto \frac{1}{ϕ}, ϕ$ = Ionic potential= $\frac{c h a r g e}{r a d i u s}$
$∴$ Thermal stability $\propto \frac{1}{\frac{c h a r g e}{r a d i u s}} \propto \frac{r a d i u s}{c h a r g e}$
$∴$ Stability order= $K_{2} C O_{3} > N a_{2} C O_{3} > M g C O_{3}$

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Similar questions

The correct order of increasing thermal stability of $K_{2} C O_{3}, M g C O_{3}, C a C O_{3}$ and $B e C O_{3}$ is:

K_{2} C O_{3}

M g C O_{3}

C a C O_{3}

B e C O_{3}

K_{2} C O_{3}, M g C O_{3}, C a C O_{3} a n d B e C O_{3}

L i_{2} C O_{3}, R b_{2} C O_{3}, C s_{2} C O_{3}, N a_{2} C O_{3}, K_{2} C O_{3}

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