Question

how is hydrogen prepared in labotary ? explain with the help of a labelled diagram .

Answer 1

Answer:

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Explanation:

In the laboratory, dihydrogen gas is prepared by taking zinc granules in a 500 ml flask.

To this, dilute HCl or dilute sulphuric acid is added through a thistle funnel.

Dihydrogen gas is released and the gas is collected by the downward displacement of water because it is a gas lighter than water

Reaction:

Reaction:Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)

Reaction:Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)Zn(s)+H2SO4(aq)→ZnSO4(aq)+H2(g).

Answer 2

Answer:

The laboratory preparation of hydrogen gas usually involves the action of dilute sulphuric acid or dilute hydrochloric acid on zinc granules.