At which of the following conditions can a gas be liquified? `T_(c)` and `P_(c)` are critical temperature and pressure.

Define critical temperature ( T_c )

A gas can be liquefied at temperature T and pressure P if-

Define critical temperature and critical pressure of a gas.

Under what condition can a gas be liquefied? (1) T=T_(c) and P lt P_(c) (2) T lt T_(c) and P=P_(c)

The critical temperature and the critical pressure of a gas are T_(c) and P_(c) , respectively. If the gas exists at a temperature of T and a pressure P, then under which of the following conditions will the gas not be liquefied? (i) T gt T_(c) , P gt P_(c) (ii) T=T_(c),PgtP_(c) (iii) T=T_(c),PltP_(c) (iv) T lt T_(c),P=P_(c)

Which of the following gases has the least value of critical temperature (T_(c )) and critical pressure (p_(c )) ?

Which of the following relation is correct ? (where T_(i) = Inversion temperature, T_(c) = Critical temperature)

The gas which can not be liquified is

The essential conditions for liquefaction of gases were discovered by Andrews in 1869 as a result of his study of pressure-volume-temperature relationship for CO_(2) . It was found that above a certain temperature, it was impossible to liquefy a gas whatever the pressure was applied. The temperature below which the gas can be liquefied by the application of pressure alone is called critical temperature (Tc). The pressure required to liquefy a gas at this temperature is called the critical pressure (Pc). The volume occupied by one mole of the substance at the critical temperature and pressure is called critical volume. Critical constants are related with van der waals' constant as follows: V_( c) = 3b, P_( c) =a/(27b^(2)), T_( c) =(8a)/(27 Rb) The values of critical volumes of four gases A, B, C and D are 0.025L, 0.312L, 0.245L and 0.432L respectively. The gas with larger molecular diameter will be :