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Redox Reactions

The minimum q...

Question

The minimum quantity of $H_{2} S$ needed to precipitate $63.5 g$ of $C u^{2 +}$ will be nearly -

A

63.5 g

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B

31.75 g

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C

34.0 g

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D

2.0 g

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Solution

The correct option is C $34.0 g$
Meq. of $H_{2} S =$ Meq. of $C u^{2 +}$
$∴ \frac{W_{H_{2} S}}{34.0 / 2} \times 1000 = \frac{63.5}{63.5 / 2} \times 1000$
$∴ W_{H_{2} S} = 34.0 g$
Hence, (c) is the correct answer.

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Redox Reactions

Standard XII Chemistry

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