The main reason for deviation of gases from ideal behaviour is few assumptions of kinetic theory . These are(i) there is no force of attraction between the molecules of a gas(ii) volume of the molecules of a gas is negligibly small incomparison to the volume of the gas(iii)particles of a gas are always in constant random motion .

The main reason for deviation of gases from ideal behaviour is few ass

1.	The main reason for deviation of gases from ideal behaviour is few assumptions of kinetic theory . These are(i) there is no force of attraction between the molecules of a gas(ii) volume of the molecules of a gas is negligibly small incomparison to the volume of the gas(iii)particles of a gas are always in constant random motion .
Answer» (i) and (II) (ii) and (III) (i) , (ii) and (iii) (iii) only Solution :ASSUMPTIONS (i) and (ii) do not hold true at all temperatures and PRESSURES.