At Boyle's temperature,the compressibility factor $Z$ for a real gas is:

The Van der Waals equation reduces itself to the ideal gas equation at

Assertion : Compressibility factor for hydrogen varies with pressure with positive slope at all pressures.
Reason : Even at low pressure,repulsive forces dominate hydrogen gas.

Between $NH_3$ and $N_2$,which one has a higher value of $(i) \ a$ and which one has a higher value of $(ii) \ b$? (Where $a$ and $b$ are van der Waals constants.)

Which of the following statements is false based on the provided graph of compressibility factor $Z$ versus pressure $P$?

For a gas,the deviation from ideal behavior is maximum at: