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Q.

Which of the following gases evolved when dilute HCl reacts with an active metal?


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a

Carbon dioxide

b

Hydrogen gas

c

Nitrogen gas

d

Hydrogen sulphide gas 

answer is B.

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Detailed Solution

The hydrogen gas evolved when dilute HCl reacts with active metal.
When a metal reacts with an acid, it leads to the production of salt with the release of hydrogen gas. Upon reaction of dilute hydrochloric acid with the active metal, chloride salt of that acid is formed with the release of hydrogen gas.
 
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