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Q.

A sample of a hydrate of barium chloride weighing 61 g was heated until all the water of hydration is removed. The dried sample weighed 52 g. The formula of the hydrated salt 'is : (atomic mass. Ba= 137 amu, Cl= 35.5 amu)

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a

BaCl2⋅4H2O

b

BaCl2⋅2H2O

c

BaCl2⋅3H2O

d

BaCl2⋅H2O

answer is A.

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Detailed Solution

For, BaCl2,n=52208=14

For, H2O,n=918=12

⇒BaCl2⋅2H2O

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