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Equivalent Mass

4 g of copper...

Question

$4 g$ of copper was dissolved in concentrated nitric acid. The copper nitrate on strong heating gave $5 g$ of its oxide. The equivalent weight of copper is _______.

A

12 g

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B

16 g

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C

32 g

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D

34 g

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Solution

The correct option is C $32 g$
Let the equivalent weight of copper be $M$
Weight of the metal oxide = $5 g$ ; weight of the metal = $4 g$
Weight of oxygen = $1 g$

$\frac{weight of the metal}{weight of oxygen} = \frac{equivalent weight of the metal}{equivalent weight of oxygen}$

$\Rightarrow \frac{4}{1} = \frac{M}{8}$
So, the equivalent weight of copper = $32 g$

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Equivalent Mass

Standard XII Chemistry

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