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Question

When zinc reacts with dilute hydrochloric acid, zinc chloride is formed along with the evolution of gas X. The evolved gas is colourless, odourless and neutral to litmus. So, gas X is:


A

H2

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B

O2

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C

CO2

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D

Cl2

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Solution

The correct option is A

H2


When zinc reacts with dilute hydrochloric acid, zinc chloride is formed along with the evolution of hydrogen gas. The evolved gas is colourless, odourless and neutral to litmus. Pure hydrogen burns with a pale blue flame when a burning splint is brought near it.


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