Question

Explain the formation of hydrogen gas by action of dilute HCl on zinc and

testing of H2 gas?​

Answer 1

Answer:

In this Reaction, Zinc Sulphate is formed which is Chalky white in color due to the reaction of the Zinc with dilute sulphuric acid. Hydrogen gas is evolved with the Pop sound. This Reaction is also known as the Displacement Reaction. In this Reaction Hydrogen is Displaced by the Zinc.

Answer 2

Answer:

When dilute HCL reacts with zinc metal, hydrogen gas is liberated.

$Zn+HCL\rightarrow H_2+ZnCl_2$

Explanation:

• Zinc reacts easily with the acid to produce hydrogen bubbles.

• It is a single displacement reaction in which hydrogen is displaced by zinc metal hydrogen gas and a salt , zinc chloride.

• To produce bubbles of hydrogen , zinc reacts rapidly with the acids.

• Zinc chloride is formed when zinc is combined with dilute sulphuric acid and hydrogen is liberated.

• It is exothermic reaction. and thus the reaction generates heat.

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