Question

17.
Which among the following is not a use of Hydrogen?
1) Synthesis of Ammonia
2) Manufacture of vanaspati fat
3) Reduction of heavy metal oxides to metals
4) Oxidise coloured compounds to colourless​

Answer 1

Answer:

oxidise coloured compound to colourless

Answer 2

The correct answer to the above question is- 4) Oxidise coloured compounds to colourless.

Hydrogen has many uses in chemical industries such as-

1. Hydrogen is used in the production of ammonia by Haber's process. This ammonia is used in the synthesis of many other compounds such as fertiliser, dyes, pesticides etc.
2. It is also used in the manufacturing of vanaspati fat from unsaturated vegetable oils. This process is called hydrogenation.
3. As a reducing agent, hydrogen is used in metallurgy to reduce heavy metal oxides to metals. For example- iron is obtained by the reduction of iron oxide.