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.

7941. Which of the following is the optimum operating condition for an exothermic reversible reaction taking place in a plug-flow reactor?

Temperature should be high in the beginning and decreased towards the end of the reaction

Very low temperature should be used throughout the reaction

Very high temperature should be used throughout the reaction

None of these

✅ The correct answer is option A.

7942. Reaction of benzene with chlorine gas to produce tri-chlorobenzene exemplifies a/an __________ reaction.

Elementary

Parallel

Consecutive

None of these

✅ The correct answer is option C.

7943. For the chemical reaction X → Y, it is observed that, on doubling the concentration of ‘X’, the reaction rate quadruples. If the reaction rate is proportional to Cxn, then what is the value of ‘n’ ?

1-Apr

✅ The correct answer is option A.

7944. The order of a chemical reaction is

An experimentally determined quantity

Always equal to the total stoichiometric number of reactants

Never fractional

None of these

✅ The correct answer is option A.

7945. The temperature dependence of reaction rate constant (K) by Arhenius law is given by

K α e-E/RT

K α eE/RT

K α T . e-E/RT

K α √T . e-E/RT

✅ The correct answer is option A.

7946. Knudsen diffusion is directly proportional to

√T

1/√T

T₂

✅ The correct answer is option B.

7947. Slurry reactors are characterised by the

Lack of intraparticle diffusion resistance

Presence of two mobile phases

Both A and B

Neither A nor B

✅ The correct answer is option C.

7948. Velocity of a chemical reaction

Decreases with increase in temperature

Increases with increase of pressure of reactants for all reactions

Decreases with increase of reactant concentration

None of these

✅ The correct answer is option D.

7949. Participation of __________ is involved in the occurrence of a chemical reaction.

Protons

Neutrons

Electrons

None of these

✅ The correct answer is option C.

7950. Carbon particles accummulated on the catalyst used in the gas oil cracking lies in the category of __________ poison.

Deposited

Chemisorbed

Selectivity

Stability

✅ The correct answer is option A.