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Q.

Statement-1: $N a C l$ and KCl are anhydrous but $M g C l_{2}$ and $C a C l_{2}$ exist as $M g C l_{2}$ . $6 H_{2} O$ and $C a C l_{2}$ . $6 H_{2} O$ respectively.
Statement-2: Hydration energies of group-2 ions are greater than those of group -1 ions because of they have small size and more charge, and have strong attraction towards water molecule.

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a

Statement-1 is True, Statement-2 is True ; Statement-2 is a correct explanation for Statement-1

b

Statement-1 is False, Statement-2 is True

c

Statement-1 is True; Statement-2 is True; Statement-2 is NOT correct explanation for Statement-1

d

Statement-1is True, Statement-2 is False.

answer is A.

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Detailed Solution

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$I I A$ Cations have high hydrate formation nature due to their high charges.

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Statement-1: NaCl and KCl are anhydrous but MgCl2 and CaCl2 exist as MgCl2 .6H2O and CaCl2 . 6H2O respectively.Statement-2: Hydration energies of group-2 ions are greater than those of group -1 ions because of they have small size and more charge, and have strong attraction towards water molecule.