(I) Barium chloride (II) Barium nitrate ; Regarding (I) and (II) the correct statement is

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Both exist as dihydrates

Both exist as anhydrous salts

(I) exists as anhydrous salt whereas (II) exist as a dihydrate

(I) exists as a dihydrate whereas (II) exists as anhydrous salt

answer is D.

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Detailed Solution

Hydration energy of Ba+2 is least of all the 2nd group cations;I BaCl2.2H2O ; II BaNO32 ;

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