Statement-I : Crude common salt is hygroscopic because of impurities CaSO4 and MgSO4Statement-II : The increase in solubility of hydroxides down the group 2 elements is due to increase in lattice energy

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Both the statements are true

Both the statements are false

I is false and II is ture

I is true and II is false

answer is B.

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Detailed Solution

Pure NaCl is not hygroscopic but common table salt is hygroscopicReason: Common table salt contains calcium chloride(CaCl2) and magnesium chloride (MgCl2) as impurities which are highly deliquescent [hygroscopic] in nature. Thus common table salt is hygroscopicNote : The ability of a compound to absorb the moisture from the atmosphere is called salt hygroscopic (or) Deliquescent salt As the size of cation increases L.E (lattice energy) decreases & H.E (hydration energy) decreases.In case of hydroxides, fluorides of IA & IIA group element, the solubility depends upon lattice energy but not depends on hydration energy. Since lattice energy decreases and hence solubility increases. Statement - I & Statement - II are incorrect

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