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Answer:
* Take a few pieces of zinc granules in a boiling tube and add about 5 mL of dilute sulphuric acid to it.
* We will observe the formation of gas bubbles on the surface of zinc granules.
* Pass the gas being formed through the soap solution taken in a trough ( by means of a glass delivery tube ). Gas filled bubbles are formed in the soap solution which rise into the air.
* Bring a burning candle near a gas- filled soap bubble. The gas present in soap bubble burns with a 'POP' sound ( making a little explosion )
* Only 'HYDROGEN GAS' burns making a 'POP' sound. This shows that hydrogen gas is evolved in the reaction of dilute sulphuric acid with zinc metal ( taken in the form of zinc granules ).
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