Question

In the schematic diagram for the preparation of hydrogen gas as shown in the figure, what would happen if the following changes are made?

Instead of dilute sulphuric acid, dilute hydrochloric acid is taken.

• A. Less gas would be evolved.
• B. More gas would be evolved.
• C. No gas would be evolved.
• D. Almost same amount of gas is evolved.

Answer 1

The correct option is D Almost same amount of gas is evolved.

If the metal in the above reaction displaces hydrogen from the acids then it is seen as hydrogen gas. The metal combines with the remaining part of the acid and forms a compound called a salt. Thus, the reaction of a metal with an acid can be summarised as:

Metal + Acid $⟶$ Metal Salt + Hydrogen gas

Thus, instead of dilute sulphuric acid if dilute hydrochloric acid is taken then almost the same amount of gas will be evolved.