At very low pressure (well below 1 atm) and moderate temperature, the compressibility factor of $CO X_{2}$ is slightly less than 1. The main reason is

Amolecular volume is comparable to the container volume
Battractive forces between molecules reduce the measured pressure
Cmolecules move faster than ideal gas molecules
D $CO X_{2}$ decomposes partially

Answer: B

At low pressure molecules are far apart, so the finite molecular volume is negligible, but weak attractions still pull molecules inward and lower the pressure on the walls. The measured

P

is below the ideal value, so

Z = P V / n RT

falls below 1.

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At very low pressure (well below 1 atm) and moderate temperature, the compressibility factor of COX2​ is slightly less than 1. The main reason is

Answer: B

More questions on Deviation from ideal behaviour and compressibility factor

At very low pressure (well below 1 atm) and moderate temperature, the compressibility factor of $CO X_{2}$ is slightly less than 1. The main reason is