Question

Which gas is usally liberated when an acid reacts with a metal illustrate with an example .How will u test for the presence of this gas?

Answer 1

Hydrogen gas is liberated when acid reacts with metal
Mg +2HCl==MgCl2+H2
Hydogen gas with a pop sound. Pure hydrogen produces pale blue flame on burning

Answer 2

Answer:

BTS

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(i) Hydrogen (H2) gas is liberated when an acid reacts with a metal.

(ii) Illustration : Set up the apparatus as shown in the given figure. Take some zinc granules in the test tube. Add about 5 mL dilute hydrochloric acid slowly. Soon the reaction between zinc and hydrochloric acid starts and hydrogen gas is evolved.

(iii) Test for H2 gas :

H2 gas is not soluble in water. When passed through soap solution, it gets trapped into bubbles.

Bring a burning candle near the soap bubble filled with gas. The soap bubble bursts and hydrogen gas burns with a pop sound.