Question

Draw a neat labelled diagram to show the liberation of hydrogen gas

Answer 1

Answer:

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Aim : To show the reaction of acids with metals

♦ Apparatus required :

1. Test tube

2. Delivery tube

3. Glass trough

4. Burner

5. Soap water

6. Dil. HCl

7. Zinc granules.

♦ Procedure : Set the apparatus as shown

[ Refer attachment ]

1. Take about 10 ml of dilute HCl in a test tube and add a few zinc granules to it.

2. We will observe the formation of gas bubbles on the surface of zinc granules.

3. Pass the gas being evolved through the soap water.Gas filled bubbles are formed in the soap solution which rise into the air.

4. Bring a burning candle near the gas filled bubbles.

5. The gas present in a soap bubble burns with a ‘pop’ sound.

♦ Chemical Eqn. :Zn + 2HCl →  ZnCl2+ H2

♦ Conclusion : Only ‘hydrogen’ gas burns making a ‘pop’ sound.

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