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1900's Physics and Wave

The molecular...

Question

The molecular mass of Mohr's salt, $F e S O_{4} (N H_{4})_{3} S O_{4} \cdot 6 H_{2} O$ , is $392$ . Its equivalent mass is

A

196

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B

39.2

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C

98.0

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D

392

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Solution

The correct option is A $392$
The valence factor of mole's salt is 1.
$∴ M o l e c u l a r m a s s = v a l e n c e f a c t o r \times e q u i v a l e n t m a s s ∵ \Rightarrow \frac{392}{1} = 392 = e q u i v a l e n t m a s s$

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