A. Red phosphorus B. Yellow phosphorus C. Black phosphorus D. Violet phosphorus
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A. S, K and N B. N, K and P C. S, K and P D. S and N
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A. Unstable B. Coloured C. Insoluble in water D. Soluble in water
A. So2 is dissolved B. Lead sulphate is consumed C. Lead is formed D. Sulphuric acid is consumed
A. Mercuric oxide B. Mercurous oxide C. Mercuric hydroxide D. Mercurous chloride
A. He B. O C. Ne D. N2
A. 3 B. 4 C. 6 D. 8
A. Blast furnace B. Arc furnace C. Reverberatory furnace D. None of these
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A. Electroplating B. Electrorefining C. Both A and B D. None of these