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(b) Give reasons for the following :
(i) Alloying is a very good method of improving the properties of a metal.
(ii) Carbon cannot be used as a reducing agent to obtain highly reactive metals from their oxides.
(iii) Silver articles become black after some time when exposed to air ?
(i) Alloying is a very good method of improving the properties of a metal.
(ii) Carbon cannot be used as a reducing agent to obtain highly reactive metals from their oxides.
(iii) Silver articles become black after some time when exposed to air ?
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(b) (i) Alloying helps in getting desired properties in metals such as alloys are hard and strong, resistant to corrosion etc. (1 Mark) (3 Marks)