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Take about 10 ml of dilute hydrochloric acid in a test tube and add a few pieces of zinc granules into it.

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Take about 10 ml of dilute hydrochloric acid in a test tube and add a few pieces of zinc granules into it. What do you observe? Why are bubbles formed in the solution?

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Take a burning candle near a bubble containing hydrogen gas, the flame goes off with a ‘Popping’ sound. This confirms that metal displaces hydrogen gas from the dilute acid.

Bubbles are formed as Zinc reacts with HCl to form ZnCl and Hydrogen gas is released

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