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N2
CO
both a & b
none
CNG used in automobiles to check pollution, mainly consists of
Coal is formed from
Cobalt - 60 is commonly used in radiation therapy because it emits
Combustion of a candle is a/an
Commercial nitric acid is coloured as it contains dissolved:
Commercially, sodium bicarbonate is known as
Constantan is an alloy of copper and
Conversion of chemical energy into electrical energy occurs in
Cooking gas is a mixture of
Copper substances when exposed to air gains a green coating due to the formation of: