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The molecules of which gas have highest speed?
The monomer of polythene is
The most abundant constituent of atmospheric air is :
The most abundant element is
The most abundant inert gas in the atmosphere is
The most abundant rare gas in the atmosphere is
The most common cause of pollution of air is
The most commonly used bleaching agent is
The most commonly used chemicals in the artificial rainmaking or cloud seeding are
The most electronegative element among the following is