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Question

Vapour density of metal chloride is 77. Equivalent weight of metal is 3 then, its atomic weight will be :

A
3
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B
6
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C
9
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D
12
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Solution

The correct option is D 12
Valency of metal is 2×vapour densityEquivalent wt of metal+35.5=2×773+35.5=15438.5=4.
The atomic weight of metal is equal to the product of the equivalent weight of metal and valency.

It is equal to 3×4=12.

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