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Preparation of Hydrogen

Hydrogen can'...

Question

Hydrogen can't be produced by the action of dil. $H_{2} S O_{4}$ on:

C u

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Z n

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F e

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A l

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Solution

The correct option is A $C u$
As standard reduction potential of $C u$ is higher than that of $H^{+}$ so, it can not reduce $H^{+}$ to $H_{2}$ .

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C u

A l

F e

Z n

Hydrogen is evolved by the action of cold dil. $H N O_{3}$ on

H_{2}

+

+

+

+

H_{2} S O_{4}

H_{2} S O_{4}

(A l / C u / Z n / F e)

H_{2}

H_{2} {S O}_{4}

H_{2}

H_{2} {S O}_{4}

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