A. 1
B. < 1
C. > 1
D. Either (b) or (c), depends on the nature of the gas
✅ The correct answer is option D.
Chemical Engineering MCQs
Van Laar equation deals with the activity co-efficients in
A. Binary solutions
B. Ternary solutions
C. Azeotropic mixture only
D. None of these
✅ The correct answer is option A.
In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is
A. More
B. Less
C. Same
D. Unpredictable; depends on the particular reaction
✅ The correct answer is option C.
Henry’s law is closely obeyed by a gas, when its __________ is extremely high.
A. Pressure
B. Solubility
C. Temperature
D. None of these
✅ The correct answer is option D.
Which of the following behaves most closely like an ideal gas?
A. He
B. N₂
C. O₂
D. H₂
✅ The correct answer is option A.
The work done in isothermal compression compared to that in adiabatic compression will be
A. Less
B. More
C. Same
D. More or less depending upon the extent of work done
✅ The correct answer is option B.
Those solutions in which there is no volume change upon mixing the components in the liquid state and which, when diluted do not undergo any heat change (i.e. heat of dilution is zero), are called __________ solutions.
A. Ideal
B. Real
C. Isotonic
D. None of these
✅ The correct answer is option A.
The change in Gibbs freee energy for vaporisation of a pure substance is
A. Positive
B. Negative
C. Zero
D. May be positive or negative
✅ The correct answer is option C.
Which of the following rubbers has the widest service temperature range (-75 to 275°C) ?
Butyl rubber
Silicon rubber
Nitrile rubber
Silicone rubber
✅ The correct answer is option D.
Gibbs free energy per mole for a pure substance is equal to the
A. Latent heat of vaporisation
B. Chemical potential
C. Molal boiling point
D. Heat capacity
✅ The correct answer is option B.