Chemical Engineering MCQs

Option A: Le-Chatelier principle

Option B: Kopp’s rule

Option C: Law of corresponding state

Option D: Arrhenius hypothesis

Correct Answer: Le-Chatelier principle ✔

Option A: Henry’s law

Option B: Law of mass action

Option C: Hess’s law

Option D: None of these

Correct Answer: Law of mass action ✔

Option A: 0

Option B: > 0

Option C: < 0

Option D: None of these

Correct Answer: 0 ✔

Option A: Prediction of the extent of a chemical reaction

Option B: Calculating absolute entropies of substances at different temperature

Option C: Evaluating entropy changes of chemical reaction

Option D: Both B. and C.

Correct Answer: D. Both B. and C. ✔

Option A: Molecular size

Option B: Volume

Option C: Pressure

Option D: Temperature

Correct Answer: Temperature ✔

Option A: The statement as per Gibbs-Helmholtz

Option B: Called Lewis-Randall rule

Option C: Henry’s law

Option D: None of these

Correct Answer: Called Lewis-Randall rule ✔

Option A: Volume

Option B: Mass

Option C: Critical temperature

Option D: None of these

Correct Answer: None of these ✔

Option A: Low temperature and high pressure

Option B: Low temperature and low pressure

Option C: High temperature and high pressure

Option D: High temperature and low pressure

Correct Answer: Low temperature and high pressure ✔

A. ds = 0
B. ds 0
D. ds = Constant

Correct Answer: ds = 0 ✔

Option A: Not liquify (barring exceptions)

Option B: Immediately liquify

Option C: Never liquify however high the pressure may be

Option D: None of these

Correct Answer: Never liquify however high the pressure may be ✔

Option A: Reversible isothermal volume change

Option B: Heating of a substance

Option C: Cooling of a substance

Option D: Simultaneous heating and expansion of an ideal gas

Correct Answer: Simultaneous heating and expansion of an ideal gas ✔

Option A: Increases

Option B: Decreases

Option C: Remain same

Option D: Decreases linearly

Correct Answer: Increases ✔

Option A: Expansion of an ideal gas against constant pressure

Option B: Atmospheric pressure vaporisation of water at 100°C

Option C: Solution of NaCl in water at 50°C

Option D: None of these

Correct Answer: Solution of NaCl in water at 50°C ✔

Option A: Initial concentration of the reactant

Option B: Pressure

Option C: Temperature

Option D: None of these

Correct Answer: Temperature ✔

Option A: Always exists

Option B: May exist

Option C: Never exists

Option D: Is difficult to predict

Correct Answer: Always exists ✔

Option A: Decrease in temperature

Option B: Increase in temperature

Option C: No change in temperature

Option D: Change in temperature which is a function of composition

Correct Answer: Increase in temperature ✔

Option A: Internal energy

Option B: Enthalpy

Option C: Entropy

Option D: All (A), B. & (C)

Correct Answer: Enthalpy ✔

Option A: 0

Option B: ∞

Option C: + ve

Option D: – ve

Correct Answer: D. – ve ✔

Option A: Not a function of its pressure

Option B: Not a function of its nature

Option C: Not a function of its temperature

Option D: Unity, if it follows PV = nRT

Correct Answer: Not a function of its pressure ✔

Option A: Pressure

Option B: Composition

Option C: Temperature

Option D: All (A), B. and (C)

Correct Answer: D. All (A), B. and (C) ✔

Option A: Heat capacity

Option B: Molal heat capacity

Option C: Pressure

Option D: Concentration

Correct Answer: Heat capacity ✔

Option A: Isobaric

Option B: Isothermal

Option C: Isentropic

Option D: Isometric

Correct Answer: Isobaric ✔

Option A: Pressure

Option B: Solubility

Option C: Temperature

Option D: None of these

Correct Answer: None of these ✔

Option A: Moisture free ice

Option B: Solid helium

Option C: Solid carbon dioxide

Option D: None of these

Correct Answer: Solid carbon dioxide ✔

Option A: 1

Option B: < 1

Option C: > 1

Option D: >> 1

Correct Answer: 1 ✔

Option A: 300 × (32/7)

Option B: 300 × (33/5)

Option C: 300 × (333/7)

Option D: 300 × (35/7)

Correct Answer: 300 × (32/7) ✔

Option A: 1

Option B: 2

Option C: 3

Option D: 0

Correct Answer: 2 ✔

Option A: Temperature only

Option B: Temperature and pressure only

Option C: Temperature, pressure and liquid composition xi only

Option D: Temperature, pressure, liquid composition xi and vapour composition yi

Correct Answer: Temperature, pressure and liquid composition xi only ✔

Option A: Fugacity

Option B: Partial pressure

Option C: Activity co-efficient

Option D: All (A), (B), and (C)

Correct Answer: All (A), (B), and (C) ✔

A. (dF)T, p 0
C. (dF)T, p = 0
D. (dA)T, v < 0

Correct Answer: (dF)T, p = 0 ✔

Option A: Air compressor

Option B: Liquid cooling system of an automobile

Option C: Boiler

Option D: None of these

Correct Answer: Liquid cooling system of an automobile ✔

Option A: Rate of heat transmission

Option B: Initial state only

Option C: End states only

Option D: None of these

Correct Answer: End states only ✔

Option A: At low temperature and high pressure

Option B: At standard state

Option C: Both A. and B

Option D: In ideal state

Correct Answer: C. Both A. and B ✔

Option A: Increases with rise in pressure

Option B: Decreases with rise in pressure

Option C: Is independent of pressure

Option D: Is a path function

Correct Answer: Is independent of pressure ✔

Option A: Rate of change of vapour pressure with temperature

Option B: Effect of an inert gas on vapour pressure

Option C: Calculation of ΔF for spontaneous phase change

Option D: Temperature dependence of heat of phase transition

Correct Answer: Rate of change of vapour pressure with temperature ✔

Option A: Value of absolute entropy

Option B: Energy transfer

Option C: Direction of energy transfer

Option D: None of these

Correct Answer: Value of absolute entropy ✔

Option A: In standard state

Option B: At high pressure

Option C: At low temperature

Option D: In ideal state

Correct Answer: In ideal state ✔

Option A: Departure from ideal solution behaviour

Option B: Departure of gas phase from ideal gas law

Option C: Vapour pressure of liquid

Option D: None of these

Correct Answer: Departure from ideal solution behaviour ✔

Option A: Volume

Option B: Enthalpy

Option C: Both A. & B

Option D: Neither A. nor B

Correct Answer: C. Both A. & B ✔

Option A: Ideal

Option B: Very high pressure

Option C: Very low temperature

Option D: All of the above

Correct Answer: Ideal ✔

Option A: d ln p/dt = Hvap/RT2

Option B: d ln p/dt = RT2/Hvap

Option C: dp/dt = RT2/Hvap

Option D: dp/dt = Hvap/RT2

Correct Answer: d ln p/dt = Hvap/RT2 ✔

Option A: Positive

Option B: Negative

Option C: Zero

Option D: Infinity

Correct Answer: Zero ✔

Option A: Adiabatic process

Option B: Isothermal process

Option C: Isobaric process

Option D: All require same work

Correct Answer: Adiabatic process ✔

Option A: Mole fraction

Option B: Fugacity at the same temperature and pressure

Option C: Partial pressure

Option D: None of these

Correct Answer: Mole fraction ✔

Option A: 0

Option B: 1

Option C: 2

Option D: 3

Correct Answer: 1 ✔

Option A: Pressure remains constant

Option B: Pressure is increased

Option C: Temperature remains constant

Option D: None of these

Correct Answer: None of these ✔

Option A: Representing actual behaviour of real gases

Option B: Representing actual behaviour of ideal gases

Option C: The study of chemical equilibria involving gases at atmospheric pressure

Option D: None of these

Correct Answer: Representing actual behaviour of real gases ✔

Option A: Any

Option B: A perfect

Option C: An easily liquefiable

Option D: A real

Correct Answer: A perfect ✔

Option A: Evaporation

Option B: Liquid extraction

Option C: Drying

Option D: Distillation

Correct Answer: Liquid extraction ✔

Option A: Pressure

Option B: Temperature

Option C: Composition

Option D: All A, B. and C

Correct Answer: Temperature ✔

Option A: A . x22

Option B: Ax1

Option C: Ax2

Option D: Ax12

Correct Answer: A . x22 ✔

Option A: Increases

Option B: Decreases

Option C: Remains unchanged

Option D: Data insufficient, can’t be predicted

Correct Answer: Remains unchanged ✔

Option A: Low T, low P

Option B: High T, high P

Option C: Low T, high P

Option D: High T, low P

Correct Answer: High T, low P ✔

Option A: Indeterminate

Option B: Zero

Option C: Negative

Option D: None of these

Correct Answer: Zero ✔

Option A: Decrease in velocity

Option B: Decrease in temperature

Option C: Decrease in kinetic energy

Option D: Energy spent in doing work

Correct Answer: Energy spent in doing work ✔

Option A: Triple point

Option B: Boiling point

Option C: Below triple point

Option D: Always

Correct Answer: Triple point ✔

Option A: Two isothermal and two isentropic

Option B: Two isobaric and two isothermal

Option C: Two isochoric and two isobaric

Option D: Two isothermals and two isochoric

Correct Answer: Two isothermal and two isentropic ✔

Option A: Lewis-Randall rule

Option B: Statement of Van’t Hoff Equation

Option C: Le-Chatelier’s principle

Option D: None of these

Correct Answer: None of these ✔

Option A: Expansion in an engine

Option B: Following a constant pressure cycle

Option C: Throttling

Option D: None of these

Correct Answer: Expansion in an engine ✔

Option A: Rectangle

Option B: Rhombus

Option C: Trapezoid

Option D: Circle

Correct Answer: Rectangle ✔

Option A: Polar

Option B: Non-polar

Option C: Both A. & B

Option D: Neither A. nor B

Correct Answer: Non-polar ✔

Option A: 30554

Option B: 10373

Option C: 4988.4

Option D: 4364.9

Correct Answer: 10373 ✔

Option A: 0

Option B: 1

Option C: ∞

Option D: None of these

Correct Answer: 1 ✔

Option A: 349

Option B: 651

Option C: 667

Option D: 1000

Correct Answer: 349 ✔

Option A: 3

Option B: 4

Option C: 5

Option D: 6

Correct Answer: 3 ✔

Option A: Enthalpy does not remain constant

Option B: Entire apparatus is exposed to surroundings

Option C: Temperature remains constant

Option D: None of these

Correct Answer: None of these ✔

Option A: Volume

Option B: Pressure

Option C: Temperature

Option D: All a, b & c

Correct Answer: Volume ✔

Option A: (∂E/∂T)V

Option B: (∂E/∂V)T

Option C: (∂E/∂P)V

Option D: (∂V/∂T)P

Correct Answer: (∂E/∂T)V ✔

Option A: Maxwell’s equation

Option B: Thermodynamic equation of state

Option C: Equation of state

Option D: Redlich-Kwong equation of state

Correct Answer: Thermodynamic equation of state ✔

Option A: P1ACBP2P1

Option B: ACBB1A1A

Option C: ACBDA

Option D: ADBB1A1A

Correct Answer: ACBDA ✔

Option A: Biological oxygen pond

Option B: Aerated lagoons

Option C: Trickling filters

Option D: Gravity separator having oil skimming devices

Correct Answer: Gravity separator having oil skimming devices ✔

Option A: 85

Option B: 105

Option C: 125

Option D: 145

Correct Answer: 105 ✔

Option A: Soluble and toxic organics

Option B: Suspended solids

Option C: Heavy metals and cyanides

Option D: All A., B. & C.

Correct Answer: D. All A., B. & C. ✔

Option A: 0.1

Option B: 1

Option C: 5

Option D: 25

Correct Answer: 5 ✔

Option A: 1-2

Option B: 5-10

Option C: 150-300

Option D: 2000-3000

Correct Answer: 150-300 ✔

Option A: Simple filtration

Option B: Oxidation followed by settling & filtration

Option C: Chemical coagulation

Option D: Chlorination only

Correct Answer: Oxidation followed by settling & filtration ✔

Option A: 0.5

Option B: 17

Option C: 357

Option D: 1097

Correct Answer: 17 ✔

Option A: Destroys/removes pathogen from the sewage

Option B: Is not very effective for non-biodegradable substances (e.g. ABS) containing effluents

Option C: Destroys/removes pathogen much more effectively if the sewage is chlorinated

Option D: All A., B. & C.

Correct Answer: D. All A., B. & C. ✔

Option A: Dental cavity

Option B: Tooth decay

Option C: Fluorosis

Option D: Respiratory disease

Correct Answer: Fluorosis ✔

Option A: Photochemical smog

Option B: Peroxyacetyl nitrate (PAN) or methyl nitrite

Option C: Benzopyrene

Option D: Polyacrylonitrile

Correct Answer: Peroxyacetyl nitrate (PAN) or methyl nitrite ✔

Option A: 5

Option B: 100

Option C: 250

Option D: 500

Correct Answer: 5 ✔

Option A: 50

Option B: 1000

Option C: 2000

Option D: 5000

Correct Answer: 50 ✔

Option A: Organic

Option B: Fatty

Option C: Inorganic

Option D: Dissolved

Correct Answer: Inorganic ✔

Option A: Respiratory ailments (e.g. bronchitis)

Option B: Skin diseases (e.g. dermatitis)

Option C: Silicosis

Option D: Blurred vision

Correct Answer: Skin diseases (e.g. dermatitis) ✔

Option A: Chlorination

Option B: Treating in biological oxygen pond

Option C: Chemical coagulation

Option D: None of these

Correct Answer: Treating in biological oxygen pond ✔

Option A: 30 to 70 kV DC

Option B: 30 to 70 kV AC

Option C: 230 V AC

Option D: 230 V DC

Correct Answer: 30 to 70 kV DC ✔

Option A: 10

Option B: 45

Option C: 90

Option D: 115

Correct Answer: 45 ✔

Option A: Hydrogen sulphide

Option B: Mercury

Option C: Cadmium

Option D: Asbestos

Correct Answer: Cadmium ✔

Option A: Forest fire

Option B: Deforestation

Option C: Volcanic eruption

Option D: None of these

Correct Answer: Volcanic eruption ✔

Option A: Fading of dyes on textiles

Option B: Corrosion, tarnishing & soiling of metals

Option C: Reduced strength of textiles

Option D: All A., B. and C.

Correct Answer: D. All A., B. and C. ✔

Option A: Turbidity

Option B: Caustic embrittlement

Option C: Suspended silica

Option D: Dissolved oxygen

Correct Answer: Caustic embrittlement ✔

Option A: Oxides of sulphur

Option B: Oxides of nitrogen

Option C: Carbon monoxide

Option D: Hydrogen sulphide

Correct Answer: Oxides of sulphur ✔

Option A: Use of silencers

Option B: Green house gases

Option C: Vibration damping

Option D: Tree plantation

Correct Answer: Green house gases ✔

Option A: Hydrocarbons

Option B: Hydrogen fluoride

Option C: Hydrogen sulphides

Option D: Nitrogen dioxide

Correct Answer: Hydrogen fluoride ✔

Option A: 20

Option B: 100

Option C: 400

Option D: 200

Correct Answer: 400 ✔

Option A: 90

Option B: 120

Option C: 150

Option D: 180

Correct Answer: 120 ✔

Option A: Stratosphere

Option B: Thermosphere

Option C: Troposphere

Option D: Mesosphere

Correct Answer: Troposphere ✔

Option A: Foul smell and taste

Option B: Iron and manganese

Option C: Temporary hardness

Option D: Permanent hardness

Correct Answer: Temporary hardness ✔

Option A: Thermosphere

Option B: Stratosphere

Option C: Troposphere

Option D: Mesosphere

Correct Answer: Stratosphere ✔

Option A: Silica

Option B: Turbidity

Option C: Phenol

Option D: Dissolved oxygen

Correct Answer: Silica ✔