Give the test for H2 gas.
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Take a burning matchstick near the mouth of a test tube in which hydrogen gas is released, the matchstick burns with a pop sound.
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Answer:
The identification of Hydrogen gas in a chemical reaction is my hearing a pop sound.
Explanation:
When a chemical reaction is carried out and hydrogen gas is released, you can easily identify it by bringing a splint or a burning matchstick near it and it will release a pop sound.
Some reactions where hydrogen gas is released is:
When magnesium reacts with hydrochloric acid, a gas is released. When magnesium reacts with hydrochloric acid, hydrogen gas is released.
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