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.

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3851. Conversion achieved in HNO₃ synthesis with the use of platinum catalyst is about 95-97%. The rate of formation of nitrogen dioxide from the oxidation of nitric acid is favoured by

Decreasing the pressure

Decreasing the temperature

Increasing the temperature

None of these

✅ The correct answer is option C.

3852. Though liquid ammonia itself is a fertiliser (with 82% nitrogen content) yet it is commonly not used as such in a tropical country like India, because it

Has a pungent smell

Vaporises at normal temperature

Is toxic and highly corrosive

Is in short supply

✅ The correct answer is option B.

3853. Reaction of nitric acid and sulphuric acid with phosphate rock produces

Nitrophosphate

Diammonium phosphate

Tricresyl phosphate

Tributyl phosphate

✅ The correct answer is option A.

3854. Nitrogen content of urea is about __________ percent.

10

46

80

94

✅ The correct answer is option B.

3855. Catalyst used in Haber’s process for ammonia production is

Reduced iron oxide

Nickel

Vanadium pentoxide

Silica gel

✅ The correct answer is option A.

3856. Promoter used in NH₃ synthesis catalyst is

K₂O

SiO₃

V₂O₅

U₂O₃

✅ The correct answer is option C.

3857. Temperature and pressure in urea autoclave is

120°C and 300 atm

190°C and 200 atm

400°C and 550 atm

200°C and 10 atm

✅ The correct answer is option B.

3858. Catalytic ammonia synthesis reaction as in Haber’s process is

Endothermic

Exothermic

Irreversible

None of these

✅ The correct answer is option B.

3859. Neutralisation of nitric acid with ammonia to produce ammonium nitrate is a/an __________ reaction.

Catalytic

Endothermic

Exothermic

Autocatalytic

✅ The correct answer is option C.

3860. Net efficiency of ordinary light water cooled nuclear reactor is about __________ percent.

32

52

72

88

✅ The correct answer is option A.