The CORRECT order of thermal stability of hydroxides

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$B a {(O H)}_{2} < S r {(O H)}_{2} < C a {(O H)}_{2} < M g {(O H)}_{2}$

$B a {(O H)}_{2} < C a {(O H)}_{2} < S r {(O H)}_{2} < M g {(O H)}_{2}$

$M g {(O H)}_{2} < S r {(O H)}_{2} < C a {(O H)}_{2} < B a {(O H)}_{2}$

$M g {(O H)}_{2} < C a {(O H)}_{2} < S r {(O H)}_{2} < B a {(O H)}_{2}$

answer is C.

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Detailed Solution

The correct order of thermal stability of hydroxide is $Mg (OH)_{2} < Ca (OH)_{2} < Sr (OH)_{2} < Ba (OH)_{2}$ On moving down the group, the lattice enthalpy increases and the thermal stability increases.

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