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a
NaOH does not form hydrated salt
b
Stability of peroxides and superoxides of alkali metals increases with increase in size of the metal ion
c
Stability of MO2 and M2O2 is due to stabilisation of larger anions by larger cations through lattice energy effects
d
The low solubility of LiF is due to its high lattice energy whereas low solubility of CsI is due to relatively smaller hydration energy
answer is B.
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Detailed Solution
(1) NaOH is crystalline deliquescent solid hence, it forms hydrated salt.Thus, it is incorrectperoxides and superoxides have larger anions hence they stablize only with larger cations