A. Heating occurs
B. Cooling occurs
C. Pressure is constant
D. Temperature is constant
✅ The correct answer is option A.
Chemical Engineering MCQs
When a gas is subjected to adiabatic expansion, it gets cooled due to
A. Decrease in velocity
B. Decrease in temperature
C. Decrease in kinetic energy
D. Energy spent in doing work
✅ The correct answer is option D.
The freezing point of a liquid decreases when the pressure is increased, if the liquid __________ while freezing.
A. Contracts
B. Expands
C. Does not change in volume
D. Either A, B or C
✅ The correct answer is option A.
As the temperature is lowered towards the absolute zero, the value of the quantity (∂ΔF/∂T) approaches
A. Zero
B. Unity
C. Infinity
D. None of these
✅ The correct answer is option A.
The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances. This is the
A. Lewis-Randall rule
B. Statement of Vant-Hoff equation
C. Le-Chatelier’s principle
D. None of these
✅ The correct answer is option D.
Maximum work that could be secured by expanding the gas over a given pressure range is the __________ work.
A. Isothermal
B. Adiabatic
C. Isentropic
D. None of these
✅ The correct answer is option A.
For a given substance at a specified temperature, activity is __________ to fugacity.
A. Directly proportional
B. Inversely proportional
C. Equal
D. None of these
✅ The correct answer is option A.
Number of degrees of freedom for a three phase system in equilibrium comprising of three non-reacting chemical species is
A. 2
B. 0
C. 1
D. 3
✅ The correct answer is option A.
Generation of heat by friction is an example of a/an __________ change.
A. Isothermal
B. Irreversible
C. Adiabatic
D. Reversible
✅ The correct answer is option B.
Internal energy of an element at 1 atm and 25° C is __________ kcal/kg.mole.
A. 0
B. 273
C. 25
D. None of these
✅ The correct answer is option A.