76.

77.

78.

79.

80.

81.

82.

83.

84.

028/22

Whatis the change in boiling point of water at a 127°C per Pascal if the molar enthalpy
of vaporisation is 40 (41111011 and molar volume change is 30 1713 mol! ?

A) 107 KPa! 8) 105 KPa"! ©) 1059871 0) 105 «8871

Which is not an application of Nernst distribution law ?
A) solvent extraction
B) study of complex ions
C) study of association and dissociation of solute
)

D) study of partial molar properties

5.2 moles of an ideal gas expand reversibly from a volume of 8 lit to 80 lit at 300K.
Calculate the approximate change in entropy in ‏.ال‎

A) 640 B) 100 C) 320 D) 10

Work done in a closed system in an adiabatic process is equal to the increase in
of the system.

A) Internal energy B) enthalpy
C) entropy D) residual entropy

The value of Joule Thomson coefficient for an ideal gas is
A) negative B) positive C) zero D) unpredictable

Calculate the approximate entropy change in (71/7017 if n-hexane boils at 68.7°C
at 1 bar pressure if the molar enthalpy of vaporisation is 28850 Jmol".

A) 8.4 B) 84.4 C) 844.4 D) 8444

Calculate the approximate amount of work if one mole of an ideal gas at 27°C
isothermally expands from a volume of 10 lit to 20 lit against a constant external
pressure of 1 atm.

A) 10 kJ 8) 1kJ ©) 0.10 kJ ഉ) 27 kJ

The term for the activity of a gas which serves as a thermodynamic counterpart of
gas pressure is

A) ensemble B) phase space C) fugacity D) parachor

What percentage of reactant will be left at the end of 25 mins, if the reaction is of
first order with a half-life period of 5 mins ?

A) 25 B) 31 C) 3.1 D) 50