Question

Which gas is usually liberated when an acid reacts with a metal? Illustrate with an example. how will you test for the presence of this gas?

Answer 1

Answer:

a) Hydrogen gas is usually liberated when an acid reacts with a metal.

b) Procedure:

Step 1: Take few pieces of zinc granules and add 5 ml of dilute H2SO4.

Step 2:  Shake it and pass the gas produced into a soap solution. Bubbles are formed in the soap solution. These soap bubbles contain hydrogen gas.

Zn + dil. H2SO4 ZnSO4 + H2

Test for hydrogen gas: The evolved hydrogen gas can be tested by bringing a burning candle near the soap bubbles. Hydrogen gas burns with a pop sound.

Answer 2

HEY FRIEND HERE IS UR ANSWER ,

When an acid react with a metal it liberates hydrogen gas.

     E.g., Zn(s) + 2HCl(aq) ZnCl2 (aq) + H2(g)

To test the presence of H2 gas, bring a burning splinter near the mouth of the test tube where H2 gas is released, the match stick bums with a pop sound.

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