which gas is us all liberated when an acid reacts with metal?illustrate with an example. how will you test for the presence of this gas ?
Answers
Answer:
Hydrogen gas is liberated.
e.g. 2NaOH+ Zn = Na2ZnO2+ H2
Explanation:
when we put a candle near the solution. we observe the pop sound . Hence , we know that the gas is Hydrogen gas
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Answer:
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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.
