Q49 of 400 Page 133

State one use each of the following non-metals: Hydrogen, Carbon (as Graphite), Nitrogen, Sulphur

Hydrogen:- for the hydrogenation of vegetable oils hydrogen is used.

Carbon (as graphite):- for the making of electrodes of the electric cell and dry cell carbon (as graphite) is used.


Nitrogen:- In the manufacturing of ammonia, nitric acid and fertilizers nitrogen is used.


Sulphur:- to prepare sulphuric acid sulphur is used.



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47 State five uses of metals and five of non-metals. 48 State one use each of the following metals: Copper, Aluminium, Iron, Silver, Gold, Mercury 49 Name the metal which is used in making thermometers. 50 Why does aluminium not react with water under ordinary conditions?