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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.

📘 Basic Chemical Engineering MCQs

📘 Chemical Process MCQs

📘 Chemical Reaction Engineering MCQs

📘 Environmental Engineering MCQs

📘 Fertilizer Technology MCQs

📘 Fluid Mechanics MCQs

📘 Fuel and Combustion MCQs

📘 Furnace Technology MCQs

📘 Heat Transfer MCQs

📘 Mass Transfer MCQs

📘 Materials and Construction MCQs

📘 Nuclear Power Engineering MCQs

📘 Petroleum Refinery Engineering MCQs

📘 Plant Economics MCQs

📘 Polymer Technology MCQs

📘 Process Equipment and Plant Design MCQs

📘 Refractory Technology MCQs

📘 Statiometery MCQs

📘 Thermodynamics MCQs

6811. The ratio of existing moles of vapor per mole of vapor free gas to the moles of vapor that would be present per mole of vapor free gas, if the mixture were saturated at the existing temperature & pressure, is termed as the

Relative humidity

Relative saturation

Percentage saturation

None of these

✅ The correct answer is option C.

6812. Pick out the correct conversion.

1 BTU =453.6 calories

1 BTU = 252 calories

1 calorie = 252 BTU

1 calorie = 453.6 BTU

✅ The correct answer is option B.

6813. Sometimes, in chemical processes, a part of the outlet stream is rejected as waste in order to keep the impurity level in the system within limits. This phenomenon is termed as the

Recycling

Purging

Bypassing

Recirculation

✅ The correct answer is option B.

6814. Isotopes are atoms having the same

Mass number

Number of neutrons

Atomic mass

None of these

✅ The correct answer is option D.

6815. According to the kinetic theory, the thermal conductivity of a monoatomic gas is proportional to

T

T0.5

T1.5

T2

✅ The correct answer is option B.

6816. Measurement of the amount of dry gas collected over water from volume of moist gas is based on the

Charle’s law

Dalton’s law of partial pressures

Avogadro’s hypothesis

Boyle’s law

✅ The correct answer is option B.

6817. Internal energy of a substance comprises of the __________ energy.

Vibrational

Rotational

Translational

All of the above

✅ The correct answer is option D.

6818. The value of (Cp – Cv)for a real gas obeying Vander Wall’s equation is

R

> R

< R

0.5 R

✅ The correct answer is option B.

6819. Avogadro’s number is equal to

Answer: Option B

null

null

null

✅ The correct answer is option B.

6820. Normality of a solution does not change with the increase in the

Pressure

Temperature

Solute concentration

Dilution of the solution

✅ The correct answer is option A.

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