Question

Which of the following gas is liberated when a metal reacts with an acid?

• A. Oxygen
• B. Helium
• C. Hydrogen
• D. CO2

Answer 1

Answer:

C. Hydrogen

Reaction of an acid with a metal:

• When an acid reacts with a metal, it forms a salt.

• Hydrogen which is in all the acids gets displaced and liberated as hydrogen gas.