Chemical Engineering MCQs

Option A: Sodium chloride

Option B: Sodium carbonate monohydrate

Option C: Anhydrous sodium sulphate

Option D: Hypo

Correct Answer: Sodium chloride ✔

Option A: Its atomic number

Option B: The number of protons or electrons present in it

Option C: The number of neutrons present in it

Option D: None of these

Correct Answer: The number of neutrons present in it ✔

Option A: Increase

Option B: Decrease

Option C: Remain unchanged

Option D: None of these

Correct Answer: Decrease ✔

Option A: 1 atm. absolute pressure & 15.5°C

Option B: 760 mm Hg gauge pressure & 15.5°C

Option C: 760 torr & 0°C

Option D: 101.325 kPa gauge pressure & 15.5°C

Correct Answer: 1 atm. absolute pressure & 15.5°C ✔

Option A: 15.5

Option B: 16

Option C: 16.5

Option D: 17

Correct Answer: 16 ✔

Option A: 6

Option B: 1

Option C: 7

Option D: 10

Correct Answer: 6 ✔

Option A: 21

Option B: 29

Option C: 23

Option D: 79

Correct Answer: 29 ✔

Option A: 2/3

Option B: 1/3

Option C: 1/2

Option D: 1/3 × (298/273)

Correct Answer: 1/3 ✔

Option A: Its molecular size is very small

Option B: Its critical temperature is more than 0°C

Option C: Forces operative between its molecules are negligible

Option D: It gets solidified directly without becoming liquid

Correct Answer: Forces operative between its molecules are negligible ✔

Option A: Increases

Option B: Decreases

Option C: Remain constant

Option D: Increases linearly

Correct Answer: Decreases ✔

Option A: 0.1013

Option B: 1.013

Option C: 10.13

Option D: 101.3

Correct Answer: 1.013 ✔

Option A: x1/x2

Option B: x2/x1

Option C: 1 – (x1/x2)

Option D: 1/x2

Correct Answer: x1/x2 ✔

Option A: Weight

Option B: Number

Option C: Volume

Option D: Radius

Correct Answer: Number ✔

Option A: Decreases with increased temperature

Option B: Decreases as pressure increases

Option C: Becomes zero at the critical point

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

Correct Answer: D. All A., B. & C. ✔

Option A: Isobars

Option B: Isotones

Option C: Isotopes

Option D: None of these

Correct Answer: Isotopes ✔

Option A: Eutectic point

Option B: Boyle temperature

Option C: Boiling point

Option D: Critical temperature

Correct Answer: Eutectic point ✔

Option A: Higher than

Option B: Smaller than

Option C: Equal to

Option D: Either A. or B.; depends on the system

Correct Answer: Smaller than ✔

Option A: Measures the elevation in boiling point

Option B: Is not dependent on the temperature

Option C: Is a function of the liquid phase composition

Option D: Measures the depression in freezing point

Correct Answer: Is a function of the liquid phase composition ✔

Option A: 5 – 200 milli-microns

Option B: 50 – 200 microns

Option C: 500 – 1000 microns

Option D: 10 – 50 Angstrom

Correct Answer: A. 5 – 200 milli-microns ✔

Option A: 10.73 kJ

Option B: 16.15 kJ

Option C: 18.11 kJ

Option D: 18.33 kJ

Correct Answer: 18.11 kJ ✔

Option A: 5

Option B: 10

Option C: 15

Option D: 20

Correct Answer: 10 ✔

Option A: Freezing point elevation

Option B: Boiling point depression

Option C: Vapor pressure lowering

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

Correct Answer: Vapor pressure lowering ✔

Option A: pOH decreases and pH increases

Option B: pOH and pH both decreases

Option C: pH and pOH both increases

Option D: pH decreases and pOH increases

Correct Answer: pOH and pH both decreases ✔

Option A: 0.5

Option B: 1

Option C: 3

Option D: 5

Correct Answer: 0.5 ✔

Option A: Less

Option B: More

Option C: Same

Option D: Either more or less; depends upon the solvent

Correct Answer: More ✔

Option A: Normality

Option B: Molarity

Option C: Molality

Option D: Formality

Correct Answer: Molality ✔

Option A: 1

Option B: 2

Option C: 3

Option D: 4

Correct Answer: 2 ✔

Option A: 10

Option B: 1

Option C: 0.1

Option D: 1000

Correct Answer: 1 ✔

Option A: 1 lb/hr.ft3.atm. = 4.8182 kg/hr.m2.bar

Option B: 1 kg/hr.m2.atm= 0.98687 kg/hr. m .bar

Option C: 1 lb/hr.ft2 = 4.8823 kg/hr.m2

Option D: 1 kg/hr.m2 = 4.8823 lb/hr.ft2

Correct Answer: 1 kg/hr.m2 = 4.8823 lb/hr.ft2 ✔

Option A: Heat of solvation

Option B: Heat of hydration

Option C: Standard integral heat of solution

Option D: Heat of mixing

Correct Answer: Heat of mixing ✔

Option A: Increases

Option B: Decreases

Option C: Remains unchanged

Option D: Either A. or B.; depends on the liquid

Correct Answer: Decreases ✔

Option A: Inventory changes do not take place

Option B: Ratio of streams entering/leaving are independent of time

Option C: Flow rates & composition both are time dependent

Option D: None of these

Correct Answer: Flow rates & composition both are time dependent ✔

Option A: 1 atm absolute pressure & 0°C

Option B: 760 mm Hg gauge pressure & 0°C

Option C: 760 torr & 15°C

Option D: 101.325 KPa gauge pressure & 0°C

Correct Answer: 1 atm absolute pressure & 0°C ✔

Option A: 109

Option B: 10-12

Option C: 1012

Option D: 1015

Correct Answer: 109 ✔

Option A: Deviate from ideal gas behaviour to the same degree

Option B: Have nearly the same compressibility factor

Option C: Both A. and B.

Option D: Neither A. nor B.

Correct Answer: C. Both A. and B. ✔

Option A: No component is concentrated at the surface of the solution

Option B: The component molecules are non polar and are of almost equal size

Option C: In the formation of solution, chemical combination/molecular association between unlike

Option D: The attractive forces between like and unlike molecules are almost equal

Correct Answer: C. In the formation of solution, chemical combination/molecular association between unlike
molecules takes place ✔

Option A: Basic

Option B: More acidic

Option C: Neutral

Option D: Of the same acidity

Correct Answer: Basic ✔

Option A: Total pressure

Option B: Absolute humidity at a given temperature

Option C: Both A. and B.

Option D: Neither A. nor B.

Correct Answer: C. Both A. and B. ✔

Option A: 6.02 × 1023 atoms of hydrogen

Option B: 4 gm atoms of hydrogen

Option C: 3.01 × 1023 molecules of methane

Option D: 3 gms of carbon

Correct Answer: 4 gm atoms of hydrogen ✔

Option A: 10

Option B: 100

Option C: 1000

Option D: 10000

Correct Answer: 10 ✔

Option A: Phase rule

Option B: Experimental data

Option C: Empirical equations

Option D: Theoretical equations

Correct Answer: Phase rule ✔

Option A: Ideal

Option B: Saturated

Option C: Supersaturated

Option D: Azeotropic

Correct Answer: Azeotropic ✔

Option A: Solvent is from low concentration to high concentration region

Option B: Solvent is from high concentration to low concentration region

Option C: Solute takes place

Option D: None of these

Correct Answer: Solvent is from low concentration to high concentration region ✔

Option A: J/kg.°K

Option B: 0°K

Option C: W/m2.°C

Option D: W/m.°K

Correct Answer: J/kg.°K ✔

Option A: Molality

Option B: Mole fraction

Option C: Weight percent

Option D: Molarity

Correct Answer: Molarity ✔

Option A: 13728 J

Option B: 19206 J

Option C: 4576 J

Option D: 12712 J

Correct Answer: 19206 J ✔

Option A: 46

Option B: 92

Option C: -23

Option D: -92

Correct Answer: 92 ✔

Option A: Are held together by stronger inter-molecular forces

Option B: Move faster

Option C: Have no definite shape

Option D: Are heavier

Correct Answer: Are held together by stronger inter-molecular forces ✔

Option A: Be reduced to 1/4th

Option B: Increase four times

Option C: Increase two times

Option D: None of these

Correct Answer: Increase two times ✔

Option A: The route/method through which final products are obtained

Option B: The physical state (e.g., solid, liquid or gaseous) of reactants and products

Option C: Whether the reaction is carried out at constant temperature or constant pressure

Option D: None of these

Correct Answer: The route/method through which final products are obtained ✔

Option A: Equilibrium constant

Option B: Conversion

Option C: Rate constant

Option D: None of these

Correct Answer: Conversion ✔

Option A: Decrease in mean free path

Option B: Increased collision rate among molecules

Option C: Increase in molecular attraction

Option D: Increase in average molecular speed

Correct Answer: Increase in molecular attraction ✔

Option A: 1 mm Hg

Option B: 1 Pascal

Option C: 1 atm

Option D: 1 mm wc

Correct Answer: 1 mm Hg ✔

Option A: 0.2500

Option B: 0.2528

Option C: 0.5000

Option D: 0.5055

Correct Answer: 0.5055 ✔

Option A: 273°

Option B: 300°

Option C: 400°

Option D: 373°

Correct Answer: 400° ✔

Option A: Xc > Xs

Option B: Xc = Xs

Option C: Xc < Xs

Option D: Xc greater/less than Xs depending on the length of the cylinder

Correct Answer: Xc < Xs ✔

Option A: Triple point

Option B: Boyle’s temperature

Option C: Eutectic point

Option D: Inversion temperature

Correct Answer: B. Boyle’s temperature ✔

Option A: Increased yield

Option B: Enrichment of product

Option C: Heat conservation

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

Correct Answer: D. All A., B. & C. ✔

Option A: Pressure

Option B: Volume

Option C: Both A. & B.

Option D: Neither A. nor B.

Correct Answer: C. Both A. & B. ✔

Option A: Dalton’s

Option B: Amagat’s

Option C: Gay-Lussac’s

Option D: Avogadro’s

Correct Answer: Amagat’s ✔

Option A: Baume scale

Option B: Twaddell scale

Option C: API scale

Option D: None of these

Correct Answer: Twaddell scale ✔

Option A: 28 litres

Option B: 35 ft3

Option C: 4.5 litres

Option D: 4.5 ft3

Correct Answer: 35 ft3 ✔

Option A: Independent of the temperature

Option B: Increased with the increase in pressure

Option C: Decreased with the increase in pressure

Option D: Unchanged by the pressure change

Correct Answer: Decreased with the increase in pressure ✔

Option A: Increases with pressure rise

Option B: Decreases with increasing pressure

Option C: Becomes zero at the critical point

Option D: Both B. & C.

Correct Answer: D. Both B. & C. ✔

Option A: Solid

Option B: Liquid

Option C: Gaseous

Option D: Nuclear

Correct Answer: Solid ✔

Option A: log (1/H+)

Option B: – log (1/H+)

Option C: 1/log H+

Option D: None of these

Correct Answer: log (1/H+) ✔

Option A: Vapor to liquid

Option B: Vapor to solid

Option C: Solid to liquid

Option D: One allotropic form to another allotropic form

Correct Answer: One allotropic form to another allotropic form ✔

Option A: 100 N/m2

Option B: 76 cms of Hg

Option C: 13.6 cms of Hg

Option D: 760 mm wc

Correct Answer: 76 cms of Hg ✔

Option A: 10-3

Option B: 10-10

Option C: 10-11

Option D: 10-13

Correct Answer: 10-11 ✔

Option A: Energy is lost during molecular collisions

Option B: Molecules possess appreciable volume

Option C: Absolute temperature is a measure of the kinetic energy of molecules

Option D: None of these

Correct Answer: Absolute temperature is a measure of the kinetic energy of molecules ✔

Option A: 5

Option B: 7

Option C: > 7

Option D: < 7

Correct Answer: 7 ✔

Option A: Solutes which dissociate or associate in the particular solution

Option B: Concentrated solutions

Option C: Both B. & C.

Option D: Solutions containing non-volatile solute

Correct Answer: C. Both B. & C. ✔

Option A: The strong base and strong acid reacts completely

Option B: The salt formed does not hydrolyse

Option C: Only OH- and H+ ions react in every case

Option D: The strong base and strong acid reacts in aqueous solution

Correct Answer: Only OH- and H+ ions react in every case ✔

Option A: 57.46

Option B: -57.46

Option C: 114.92

Option D: -28.73

Correct Answer: 57.46 ✔

Option A: Boyle’s law

Option B: Amagat’s law

Option C: Raoult’s law

Option D: Trouton’s rule

Correct Answer: C. Raoult’s law ✔

Option A: -109.5

Option B: +109.5

Option C: +180

Option D: +100

Correct Answer: -109.5 ✔

Option A: TVγ-1 = constant

Option B: p1-γ.TY = constant

Option C: PVγ = constant

Option D: None of these

Correct Answer: None of these ✔

Option A: Equation of state

Option B: Gibbs Duhem equation

Option C: Ideal gas equation

Option D: None of these

Correct Answer: Equation of state ✔

Option A: More

Option B: Less

Option C: Same

Option D: More or less; depending on the system

Correct Answer: Same ✔

Option A: Temperature vs. enthalpy

Option B: Temperature vs. enthalpy

Option C: Entropy vs. enthalpy

Option D: Temperature vs. internal energy

Correct Answer: Entropy vs. enthalpy ✔

Option A: Critical

Option B: Boyle

Option C: Inversion

Option D: Reduced

Correct Answer: Boyle ✔

Option A: Always greater than one

Option B: Same at the same reduced temperature

Option C: Same at the same reduced pressure

Option D: Both B. & C

Correct Answer: D. Both B. & C ✔

Option A: Isothermally

Option B: Isobarically

Option C: Adiabatically

Option D: None of these

Correct Answer: Adiabatically ✔

Option A: 0

Option B: 1

Option C: 2

Option D: 3

Correct Answer: 0 ✔

Option A: More than

Option B: Less than

Option C: Equal to

Option D: Not related to

Correct Answer: Equal to ✔

Option A: its internal energy (U) decreases and its entropy (S) increases

Option B: U and S both decreases

Option C: U decreases but S is constant

Option D: U is constant but S decreases

Correct Answer: U and S both decreases ✔

Option A: H = E – PV

Option B: H = F – TS

Option C: H – E = PV

Option D: None of these

Correct Answer: C. H – E = PV ✔

Option A: ∞

Option B: 1

Option C: 0

Option D: -ve

Correct Answer: 0 ✔

Option A: Reversible

Option B: Irreversible

Option C: Isothermal

Option D: Adiabatic

Correct Answer: Reversible ✔

Option A: Two

Option B: One

Option C: Zero

Option D: Three

Correct Answer: One ✔

Option A: Calorific value

Option B: Heat of reaction

Option C: Heat of combustion

Option D: Heat of formation

Correct Answer: Heat of combustion ✔

Option A: Zero

Option B: Unity

Option C: Infinity

Option D: Negative

Correct Answer: Zero ✔

Option A: 0

Option B: 2

Option C: 1

Option D: 3

Correct Answer: 1 ✔

Option A: High temperature

Option B: Low pressure

Option C: Low temperature only

Option D: Both low temperature and high pressure

Correct Answer: Both low temperature and high pressure ✔

Option A: 580

Option B: 640

Option C: 1160

Option D: Data insufficient; can’t be computed

Correct Answer: 1160 ✔

Option A: Zero

Option B: Positive

Option C: Negative

Option D: None of these

Correct Answer: Zero ✔

Option A: Increase

Option B: Decrease

Option C: Remain unchanged

Option D: First fall and then rise

Correct Answer: Increase ✔

Option A: Critical

Option B: Triple

Option C: Freezing

Option D: Boiling

Correct Answer: Critical ✔

Option A: Enthalpy

Option B: Volume

Option C: Both A. & B.

Option D: Neither A nor B

Correct Answer: C. Both A. & B. ✔

Option A: State function

Option B: Macroscopic property

Option C: Extensive property

Option D: None of these

Correct Answer: None of these ✔