Chemical Engineering MCQs

Option A: Enthalpy

Option B: Pressure

Option C: Entropy

Option D: None of these

Correct Answer: Entropy ✔

A. 0
B. 1
C. 1

Correct Answer: 1 ✔

Option A: Minimum number of degree of freedom of a system is zero

Option B: Degree of freedom of a system containing a gaseous mixture of helium, carbon dioxide and

Option C: For a two phase system in equilibrium made up of four non-reacting chemical species, the

Option D: Enthalpy and internal energy change is zero during phase change processes like melting,

Correct Answer: D. Enthalpy and internal energy change is zero during phase change processes like melting,
vaporisation and sublimation ✔

Option A: Accomplishes only space heating in winter

Option B: Accomplishes only space cooling in summer

Option C: Accomplishes both A. and B

Option D: Works on Carnot cycle

Correct Answer: C. Accomplishes both A. and B ✔

Option A: Single phase fluid of varying composition

Option B: Single phase fluid of constant composition

Option C: Open as well as closed systems

Option D: Both B. and C

Correct Answer: D. Both B. and C ✔

Option A: Enthalpy

Option B: Entropy

Option C: Pressure

Option D: None of these

Correct Answer: Enthalpy ✔

Option A: TR/(T2 – TR) × (T1 – T2)/T1

Option B: TR/(T2 – TR) × T1/(T1 – T2)

Option C: TR/(T1 – TR) × (T1 – T2)/T1

Option D: None of these

Correct Answer: A. TR/(T2 – TR) × (T1 – T2)/T1 ✔

Option A: 2

Option B: 0

Option C: 1

Option D: 3

Correct Answer: 2 ✔

Option A: States that n1dμ1 + n2dμ2 + ….njdμj = 0, for a system of definite composition at constant

Option B: Applies only to binary systems

Option C: Finds no application in gas-liquid equilibria involved in distillation

Option D: None of these

Correct Answer: A. States that n1dμ1 + n2dμ2 + ….njdμj = 0, for a system of definite composition at constant
temperature and pressure ✔

Option A: Molar concentration

Option B: Quantity (i.e. number of moles)

Option C: Both A. and B

Option D: Neither A. nor B

Correct Answer: C. Both A. and B ✔

Option A: Zero

Option B: Positive

Option C: Negative

Option D: Indeterminate

Correct Answer: Zero ✔

Option A: Specific volume

Option B: Temperature

Option C: Mass

Option D: Pressure

Correct Answer: Mass ✔

Option A: Low temperature

Option B: High pressure

Option C: Both A. and B

Option D: Neither A. nor B

Correct Answer: C. Both A. and B ✔

Option A: Extensive property

Option B: Intensive property

Option C: Force which drives the chemical system to equilibrium

Option D: Both B. and C

Correct Answer: D. Both B. and C ✔

Option A: Path

Option B: Point

Option C: State

Option D: None of these

Correct Answer: Path ✔

Option A: Carnot

Option B: Air

Option C: Absorption

Option D: vapour-ejection

Correct Answer: Absorption ✔

Option A: Joule-Thomson co-efficient

Option B: Specific heat at constant pressure (Cp)

Option C: co-efficient of thermal expansion

Option D: Specific heat at constant volume (CV)

Correct Answer: co-efficient of thermal expansion ✔

Option A: Increased COP

Option B: Same COP

Option C: Decreased COP

Option D: Increased or decreased COP; depending upon the type of refrigerant

Correct Answer: Increased COP ✔

Option A: 0.25

Option B: 0.5

Option C: 0.75

Option D: 1

Correct Answer: 0.5 ✔

Option A: 0.5

Option B: 3.5

Option C: 4.5

Option D: 8.5

Correct Answer: 3.5 ✔

Option A: J/s

Option B: J.S

Option C: J/kmol

Option D: kmol/J

Correct Answer: J.S ✔

Option A: 1.987 cal/gm mole °K

Option B: 1.987 BTU/lb. mole °R

Option C: Both A. and B

Option D: Neither A. nor B

Correct Answer: C. Both A. and B ✔

Option A: Same in both the phases

Option B: Zero in both the phases

Option C: More in vapour phase

Option D: More in liquid phase

Correct Answer: Same in both the phases ✔

Option A: SO2

Option B: NH3

Option C: CCl2F2

Option D: C2H4Cl2

Correct Answer: C2H4Cl2 ✔

Option A: A homogeneous solution (say of phenol water) is formed

Option B: Mutual solubility of the two liquids shows a decreasing trend

Option C: Two liquids are completely separated into two layers

Option D: None of these

Correct Answer: A homogeneous solution (say of phenol water) is formed ✔

Option A: (∂T/∂V)S, ni = -(∂P/∂S)V, ni

Option B: (∂S/∂P)T, ni = (∂V/∂T)P, ni

Option C: (∂S/∂V)T, ni = (∂P/∂T)V, ni

Option D: (∂T/∂P)S, ni = (∂V/∂S)P, ni

Correct Answer: (∂T/∂P)S, ni = (∂V/∂S)P, ni ✔

Option A: Temperature

Option B: Pressure

Option C: Volume

Option D: None of these

Correct Answer: Pressure ✔

Option A: 2

Option B: 0

Option C: 3

Option D: 1

Correct Answer: 2 ✔

Option A: Bertholet equation

Option B: Clausius-Clapeyron equation

Option C: Beattie-Bridgeman equation

Option D: None of these

Correct Answer: Clausius-Clapeyron equation ✔

Option A: Increases

Option B: Decreases

Option C: Remains unchanged

Option D: Decreases linearly

Correct Answer: Increases ✔

Option A: Cp < Cv

Option B: Cp = Cv

Option C: Cp > Cv

Option D: C ≥ Cv

Correct Answer: Cp = Cv ✔

Option A: Isothermal

Option B: Adiabatic

Option C: Isobaric

Option D: Isometric

Correct Answer: Isothermal ✔

Option A: Melting point of ice

Option B: Melting point of wax

Option C: Boiling point of liquids

Option D: None of these

Correct Answer: Melting point of ice ✔

Option A: Less than

Option B: Same as

Option C: More than

Option D: Half

Correct Answer: Less than ✔

Option A: 3

Option B: 2

Option C: 1

Option D: 0

Correct Answer: 1 ✔

Option A: Vapor pressure

Option B: Specific Gibbs free energy

Option C: Specific entropy

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

Correct Answer: Vapor pressure ✔

Option A: 0.15

Option B: 1.5

Option C: 4.5

Option D: 6.5

Correct Answer: 0.15 ✔

Option A: (∂P/∂V)T

Option B: (∂V/∂T)P

Option C: (∂P/∂V)V

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

Correct Answer: (∂P/∂V)T ✔

Option A: Saturated vapour

Option B: Solid

Option C: Gas

Option D: Liquid

Correct Answer: Gas ✔

Option A: Vapour pressure is relatively low and the temperature does not vary over wide limits

Option B: Vapour obeys the ideal gas law and the latent heat of vaporisation is constant

Option C: Volume in the liquid state is negligible compared with that in the vapour state

Option D: All A, B. and C

Correct Answer: D. All A, B. and C ✔

Option A: 0

Option B: +ve

Option C: -ve

Option D: ∞

Correct Answer: +ve ✔

Option A: Adiabatic

Option B: Reversible

Option C: Isothermal

Option D: None of these

Correct Answer: Isothermal ✔

Option A: dE = Tds – PdV

Option B: dQ = CvdT + PdV

Option C: dQ = CpdT + Vdp

Option D: Tds = dE – PdV

Correct Answer: A. dE = Tds – PdV ✔

Option A: Pressure

Option B: Volume

Option C: Temperature

Option D: All A, B. & C

Correct Answer: Temperature ✔

Option A: 100

Option B: 50

Option C: 205

Option D: 200

Correct Answer: 200 ✔

Option A: A heating effect

Option B: No change in temperature

Option C: A cooling effect

Option D: Either A. or (C)

Correct Answer: A heating effect ✔

Option A: Increases

Option B: Decreases

Option C: Remains unchanged

Option D: May increase or decrease; depends on the substance

Correct Answer: Increases ✔

Option A: CV

Option B: Entropy change

Option C: Gibbs free energy

Option D: None of these

Correct Answer: None of these ✔

Option A: R loge 4

Option B: R log10 4

Option C: Cv log10 4

Option D: Cv loge 4

Correct Answer: R loge 4 ✔

Option A: Molar concentration

Option B: Temperature

Option C: Internal energy

Option D: None of these

Correct Answer: None of these ✔

Option A: Sub-cooled

Option B: Saturated

Option C: Non-solidifiable

Option D: None of these

Correct Answer: Sub-cooled ✔

Option A: Mass

Option B: Energy

Option C: Momentum

Option D: None of these

Correct Answer: Energy ✔

Option A: Entropy

Option B: Temperature

Option C: Enthalpy

Option D: Pressure

Correct Answer: Pressure ✔

Option A: Isothermal

Option B: Adiabatic

Option C: Isobaric

Option D: Isochoric

Correct Answer: Isothermal ✔

Option A: Work required to refrigeration obtained

Option B: Refrigeration obtained to the work required

Option C: Lower to higher temperature

Option D: Higher to lower temperature

Correct Answer: Refrigeration obtained to the work required ✔

Option A: At constant pressure

Option B: By throttling

Option C: By expansion in an engine

Option D: None of these

Correct Answer: By expansion in an engine ✔

Option A: Same

Option B: Doubled

Option C: Halved

Option D: One fourth of its original value

Correct Answer: Same ✔

Option A: More than

Option B: Less than

Option C: Equal to

Option D: Data insufficient, can’t be predicted

Correct Answer: Equal to ✔

Option A: Pressure

Option B: Volume

Option C: Temperature

Option D: All A , B. and C

Correct Answer: Volume ✔

Option A: Solid-vapor

Option B: Solid-liquid

Option C: Liquid-vapor

Option D: All A, B. and C

Correct Answer: D. All A, B. and C ✔

Option A: Gibbs-Duhem

Option B: Gibbs-Helmholtz

Option C: Maxwell’s

Option D: None of these

Correct Answer: C. Maxwell’s ✔

Option A: The amount of work needed is path dependent

Option B: Work alone cannot bring out such a change of state

Option C: The amount of work needed is independent of path

Option D: More information is needed to conclude anything about the path dependence or otherwise of

Correct Answer: The amount of work needed is path dependent ✔

Option A: T

Option B: √T

Option C: T2

Option D: 1/√T

Correct Answer: T ✔

Option A: Increase the partial pressure of H2

Option B: Increase the partial pressure of I2

Option C: Increase the total pressure and hence shift the equilibrium towards the right

Option D: Not affect the equilibrium conditions

Correct Answer: Not affect the equilibrium conditions ✔

Option A: -1.87

Option B: 0

Option C: 1.26

Option D: 3.91

Correct Answer: 0 ✔

Option A: Hour

Option B: Day

Option C: Minute

Option D: Second

Correct Answer: Day ✔

Option A: 4 J

Option B: ∞

Option C: 0

Option D: 8 J

Correct Answer: 0 ✔

Option A: Sublimation

Option B: Vaporisation

Option C: Melting

Option D: Either A, B. or C.

Correct Answer: D. Either A, B. or C. ✔

Option A: Work done under adiabatic condition

Option B: Co-efficient of thermal expansion

Option C: Compressibility

Option D: None of these

Correct Answer: Work done under adiabatic condition ✔

Option A: Reverse Carnot cycle

Option B: Ordinary vapour-compression cycle

Option C: Vapour-compression process with a reversible expansion engine

Option D: Air refrigeration cycle

Correct Answer: Air refrigeration cycle ✔

Option A: Chemical potential

Option B: Activity

Option C: Fugacity

Option D: Activity co-efficient

Correct Answer: Chemical potential ✔

Option A: Snow melts into water

Option B: A gas expands spontaneously from high pressure to low pressure

Option C: Water is converted into ice

Option D: Both B. & C

Correct Answer: D. Both B. & C ✔

Option A: Low pressure and high temperature

Option B: Low pressure and low temperature

Option C: Low temperature and high pressure

Option D: High temperature and high pressure

Correct Answer: Low temperature and high pressure ✔

Option A: (∂T/∂V)S = – (∂P/∂S)V

Option B: (∂S/∂P)T = – (∂V/∂T)P

Option C: (∂V/∂S)P = (∂T/∂P)S

Option D: (∂S/∂V)T = (∂P/∂T)V

Correct Answer: (∂S/∂V)T = (∂P/∂T)V ✔

Option A: Negative

Option B: Zero

Option C: Infinity

Option D: None of these

Correct Answer: Zero ✔

Option A: The same

Option B: Less than

Option C: Greater than

Option D: Different than

Correct Answer: The same ✔

Option A: RT d ln P

Option B: R d ln P

Option C: R d ln f

Option D: None of these

Correct Answer: RT d ln P ✔

Option A: Ideal compression of air

Option B: Free expansion of an ideal gas

Option C: Adiabatic expansion of steam in a turbine

Option D: Adiabatic compression of a perfect gas

Correct Answer: Free expansion of an ideal gas ✔

Option A: Increase

Option B: Decrease

Option C: Remain unaltered

Option D: Increase or decrease; depends on the particular reaction

Correct Answer: Remain unaltered ✔

Option A: Decreases

Option B: Increases

Option C: Remain same

Option D: May increase or decrease; depends on the nature of the gas

Correct Answer: Decreases ✔

Option A: T2/(T1 – T2)

Option B: T1/(T1 – T2)

Option C: (T1 – T2)/T1

Option D: (T1 – T2)/T2

Correct Answer: A. T2/(T1 – T2) ✔

Option A: Property of the system

Option B: Path function

Option C: Point function

Option D: State description of a system

Correct Answer: Path function ✔

Option A: Cv.dT

Option B: Cp.dT

Option C: ∫ Cp.dT

Option D: ∫ Cv.dT

Correct Answer: Cp.dT ✔

Option A: Equilibrium cannot be established

Option B: More ice will be formed

Option C: More water will be formed

Option D: Evaporation of water will take place

Correct Answer: More water will be formed ✔

Option A: Tds = dE – dW = 0

Option B: dE – dW – Tds = 0

Option C: Tds – dE + dW < 0

Option D: Tds – dT + dW < 0

Correct Answer: C. Tds – dE + dW < 0 ✔

Option A: T1/(T1-T2)

Option B: T2/(T1-T2)

Option C: T1/T2

Option D: T2/R1

Correct Answer: T1/(T1-T2) ✔

Option A: 12 P1V1

Option B: 6 P1 V1

Option C: 3 P1V1

Option D: P1 V1

Correct Answer: 3 P1V1 ✔

Option A: Temperature

Option B: Specific heat

Option C: Volume

Option D: Pressure

Correct Answer: Temperature ✔

Option A: ∞

Option B: 0

Option C: < 0

Option D: > 0

Correct Answer: 0 ✔

Option A: If an insoluble gas is passed through a volatile liquid placed in a perfectly insulated container,

Option B: A process is irreversible as long as Δ S for the system is greater than zero

Option C: The mechanical work done by a system is always equal to∫P.dV

Option D: The heat of formation of a compound is defined as the heat of reaction leading to the

Correct Answer: D. The heat of formation of a compound is defined as the heat of reaction leading to the
formation of the compound from its reactants ✔

Option A: Zeroth

Option B: First

Option C: Second

Option D: Third

Correct Answer: Second ✔

Option A: Increase

Option B: Decrease

Option C: Remain same

Option D: Increase in summer and will decrease in winter

Correct Answer: Increase ✔

Option A: Adiabatic expansion

Option B: Joule-Thomson effect

Option C: Both A. and B

Option D: Neither A. nor B

Correct Answer: C. Both A. and B ✔

Option A: Decreases

Option B: Increases

Option C: Remains constant

Option D: Decreases logarithmically

Correct Answer: Increases ✔

Option A: Solution

Option B: Vaporisation

Option C: Formation

Option D: Sublimation

Correct Answer: Vaporisation ✔

Option A: Less pronounced

Option B: More pronounced

Option C: Equal

Option D: Data insufficient, can’t be predicted

Correct Answer: More pronounced ✔

Option A: Heating takes place

Option B: Cooling takes place

Option C: Pressure is constant

Option D: Temperature is constant

Correct Answer: Cooling takes place ✔

Option A: 1

Option B: 2

Option C: 3

Option D: 4

Correct Answer: 2 ✔

Option A: Straight line

Option B: Sine curve

Option C: Parabola

Option D: Hyperbola

Correct Answer: Straight line ✔

Option A: Tds = dE + dW

Option B: dE – dW = Tds

Option C: dW – dE = Tds

Option D: Tds – dW + dE >0

Correct Answer: Tds = dE + dW ✔