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Physical and Chemical Properties of Hydrogen

When the same...

Question

When the same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volumes of hydrogen evolved is:

A

1:1

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B

1:2

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C

2:1

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D

9:4

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Solution

The correct option is A 1:1
$Z n + H_{2} S O_{4} E x c e s s \to Z n S O_{4} + H_{2}$

$Z n + 2 N a O H E x c e s s \to N a_{2} Z n O_{2} S o d i u m z i n c a t e + H_{2} ↑$

i.e. $1 : 1$

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