The ammonia synthesis reaction represented by N2 + 3H2 ⇌ 2NH3; ΔH = – 22.4 kcal, is:
A. Endothermic
B. Exothermic
C. Isothermal
D. Adiabatic
Gibbs free energy at constant pressure and temperature under equilibrium conditions is:
A. ∞
B. 0
C. Maximum
D. Minimum
Consider the reaction, C + O2 ⇌ CO2; ΔH = – 94 kcal. What will be the value of ΔH for the reaction CO2 → C + O2:
A. -94 kcal
B. +94 kcal
C. > 94 kcal
D. < -94 kcal
Entropy is a measure of the ____ of a system:
A. Disorder
B. Orderly behaviour
C. Temperature changes only
D. None of these
An isentropic process is carried out at constant:
A. Volume
B. Pressure
C. Temperature
D. All (A), B. and (C)
The specific heat of saturated water vapour at 100°C is:
A. ∞
B. -ve
C. 0
D. +ve
Specific volume of an ideal gas is:
A. Equal to its density
B. The reciprocal of its density
C. Proportional to pressure
D. None of these
The point at which all the three (solid, liquid and gas) phases co-exist, is known as the ____ point:
A. Freezing
B. Triple
C. Boiling
D. Boyle
Which of the following has the least thermal efficiency:
A. Steam engine
B. Carnot engine
C. Diesel engine
D. Otto engine
Heat evolved/absorbed during conversion of a substance from one allotropic form to another is termed as the heat of:
A. Fusion
B. Vaporisation
C. Transition
D. None of these
