Question

Give a reason for the following:

Granulated zinc is preferred for preparation of hydrogen.

Answer 1

Zinc (Zn) granules-

• It is condition of zinc metal with high surface area and high particle size.

Reason to use for preparation of hygrogen gas (H₂)-

• It has impurities of copper which acts as a catalyst and speeds up the process.
• It has more surface area exposed to the acid, so the reaction can occur more rapidly.

Catalyst:

• It is a substance that makes a chemical reaction happen faster without self being consumed.