Question

why are zinc granules used in preparation of hydrogen​

Answer 1

Answer:

Granulated zinc gives more surface area for the acid to act, so hydrogen is formed faster. Also, granulated zinc has copper as an impurity, which catalyses the reaction.

Answer 2

Zinc is used to prepare hydrogen because zinc easily reacts due to its high surface area and reactivity.

Preparation/reaction -

Here,

we mostly use HCl acid which is very common for preparation of hydrogen.

Example -

Zn + 2HCl ----> ZnCl2 + H2

Above is the balanced reaction for the preparation of hydrogen gas through zinc element.

hope it helps...