Question

wtite the loboratory prepration of dihydrogen​

Answer 1

In the laboratory, dihydrogen is prepared by the treatment of zinc granules with dil.H2SO4. Dihydrogen of high degree of purity is prepared by the electrolysis of water in the presence of small amount of acid or base.

Answer 2

Answer:

In the laboratory, dihydrogen is prepared by the action of diluted sulphuric acid on granulated zinc.

It can also be prepared by the reaction of zinc with aqueous alkali.

Zn + 2NaOH → Na2ZnO2 + H2