Question

which gas is usually liberated when an acid reacts with a metal insulated with an example how will you test for the presence of this gas​

Answer 1

Answer:

hydrogen gas is liberated

ex.

2Na+2HCl -- 2NaCl+H2

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.