S P Singh Solutions for Chapter: Study of the First Elements-Hydrogen, Exercise 2: EXERCISE 6(B)

Hydrogen is evolved by the action of cold dilute ${\mathrm{HNO}}_3$ on

Which metal adsorbs hydrogen?

The composition of the nucleus of deuterium is

Elements that show unique nature in the preparation of hydrogen are:

Give the reason for the following:

Zinc granules are used in the laboratory preparation of hydrogen.

Give the reason for the following:

Purified and dry hydrogen is collected over mercury.

For laboratory preparation of hydrogen, give the reason for the following:

The end of the thistle funnel should be dipped under acid.

Give the reason for the following:

Dilute sulphuric acid cannot be replaced by concentrated acid in the preparation of hydrogen.