The metals commonly used for electroplating are (1) Gold, Sodium and Chromium (2) Chromium, Copper and Nickel (3) Nickel, Lead and Chromium (4) Gold, Sodium and Potassium Answer : Chromium, Copper and Nickel...
Galvanised iron is made by coating iron with (1) Zinc (2) Nickel (3) Chromium (4) Sulphur Answer : Zinc...
The toxicity of which of the following heavy metals leads to liver cirrbosis? (1) Copper (2) Lead (3) Mercury (4) Zinc Answer : Copper...
Which one of the following metals pollutes the air of a city having large number of automobiles? (1) Cadmium (2) Chromium (3) Lead (4) Copper Answer : Lead...
Which of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torch lights, electric shavers, etc. ? (1) Iron and cadmium (2) Nickel and cadmium (3) Lead peroxide and lead (4) Zinc and carbon Answer : Nickel and cadmium...
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