1.

In a gaseous reaction of the typeaA +bB-cC + dD,which statement is wrong?(1) a litre of A combines with b litre of B to give(2) a mole of A combines with b moles of B to give(3) a g of A combines with b g of B to give(4) a molecules of A combines with b molecules ofC and DC and DC and DB to give C and D

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