Chemical Engineering Archives

Chemical Engineering

Prepare with the best Chemical Engineering MCQs with answers and detailed explanations for exams and job tests. Our collection covers key topics such as chemical process calculations, thermodynamics, fluid mechanics, heat transfer, mass transfer, reaction engineering, instrumentation, and plant design. These Chemical Engineering multiple-choice questions are ideal for students, competitive exam aspirants, and professionals preparing for NTS, PPSC, FPSC, PEC exams, GATE, university entry tests, and job interviews. Practice online with updated Chemical Engineering MCQs to strengthen your concepts and improve technical problem-solving skills.

7831. The reaction rate almost gets doubled for 10°C rise in temperature. This is due to the fact that the

Increased temperature reduces the activation energy

Fraction of molecules having threshold energy increases

Collision frequency increases

Value of threshold energy decreases

✅ The correct answer is option B.

7832. Integral method for analysing the kinetic data is used

When the data are scattered

For testing specific mechanisms with simple rate expressions

Both A and B

None of these

✅ The correct answer is option C.

7833. __________ resistance is not involved in the combustion of a carbon particle.

Gas film

Ash

Chemical reaction

None of these

✅ The correct answer is option B.

7834. For a homogeneous reaction of nth order, the dimension of the rate constant is given by

L/(time)n

(concentration)1 – n/(time)

(concentration)n – 1/(time)

None of these

✅ The correct answer is option B.

7835. Half life period of a chemical reaction is

The time required to reduce the concentration of the reacting substance to half its initial value

Half of the space time of a reaction

Half of the residence time of a reaction

None of these

✅ The correct answer is option A.

7836. Fluid flow in a real packed bed can be approximated as __________ model.

Plug flow

Dispersion

Mixed flow

Tank in series

✅ The correct answer is option B.

7837. Radioactive decay follows __________ order kinetics.

First

Second

Third

Zero

✅ The correct answer is option A.

7838. A reaction which is catalysed by an acid is also catalysed by any substance, which has a tendency to

Lose a proton

Gain a proton

Lose an electron

None of these

✅ The correct answer is option A.

7839. When a catalyst increases the rate of forward reaction, the value of rate constant

Increases

Decreases

Remain same

Becomes infinite

✅ The correct answer is option A.

7840. A multiple reaction may be classified as a __________ reaction.

Consecutive or side

Parallel or side

Mixed

All of the above

✅ The correct answer is option D.