76.

77.

78.

79.

80.

81.

82.

83.

84.

A system with zero-degree of freedom is known ೩5 :
(A) Monovarient ൯) Bivarient
(0 Invarient (D) None of these

A catalyst will increase the rate of a chemical reaction by :
(A) _ shifting the equilibrium to the right
(B) _ shifting the equilibrium to the left
(C) increasing the activation energy
(D) lowering the activation energy

The units of erg, Joule and Calorie are interconvertible, which of the following is incorrect :

(^) 10’ ergs = 1 Joule (B) 4.184J=1Cal

(0) 1Joule = 0.2390 Cal (0) lerg= 4.184 Cal
One mole of an ideal gas at 300 K is expanded isothermally from 1 litre volume to 10 litre
volume. AE for the process is ‏سل‎ (R = 2 Cal ಇ. mol!) :

(^) 300 cal (B) 600 cal

(C) 1200 cal (D) Ocal
The equation dp = _ ‏گلا‎ _ is called :

aT T(V,-V,)
(A) (1078 Helmholtz equation ൯) Clapeyron equation
(0 Kirchoff’s equation (D) None of these

A process is in the equilibrium state when :
(A) AG=0 (B) AG>O
(0) ‏8ھ‎ > 0 (D) None of these

The efficiency of a heat engine operating between 400 K and 300 1815 :
(A) 1.0 (B) 0.75
(C) 0.50 (D) 0.25

Ina process AH = 100 KJ and AS = 100J/K at 400 K. The value of AG will be :
(A) 0 (B) 100 KJ
(©) 60 KJ (0) 5019

The half life for a first order reaction is 2768 years. If the concentration after 11072 years is
0.0216 M, what was the initial concentration?

(A) 0.0690 M (B) 0.345 1
(0 0.173M (D) 1.000M

043/2022 12 A