86.

87.

88.

89.

90.

91.

92.

Third law of thermodynamics states that

(A) All spontaneous processes are accompanied by degradation of energy
(B) All spontaneous processes are to some extent irreversible

(C) Energy can neither be created nor destroyed
(D) At absolute zero, entropy of a pure crystalline substance is zero

If two Mixed Flow Reactors in series are used for a second order reaction, which of the
following arrangements will perform better ?

(A) Smaller reactor first, followed by a larger reactor

(B) Larger reactor first, followed by a smaller reactor

(C) Two equal sized reactors in series

(>) ‏1ھ‎ the above give same performance

The reaction 2A + ए — C is a zero order reaction. If C, and நே are concentrations of A
and B respectively and k is rate constant, rate of this reaction can be given by the
expression

(ಹ) ty =kC,Cy (8) -\ = 0 ‏و‎

(0 പ (0) ‏کم‎

For a system at temperature T and pressure P, any movement away from equilibrium
leads to

(^) (AG) p <0 (8) (AG); p> 0
(C) Both (A) and (8) (0) ൭൭൭൦0

An isothermal gas phase reaction, R -> 42, 50% inert is present in the system. Fractional
change in volume, 8 ^ in this case is

(A) 3 (B) 1.5

(6 -3 (0) -1.50

Pick out wrong statement.
(A) Maximum possible extent of a reaction is given by thermodynamics.
(B) Factors influencing rate of reaction are obtained from chemical kinetics.
(C) Heat liberated or absorbed during a reaction can be calculated from
thermodynamic data.
(D) For all reactions, thermodynamic information alone is sufficient for design.

Constant volume hydrometer is used to measure
(^) density (B) viscosity
(ಲ) _ pressure (D) composition
[P.T.O.]