Thermodynamics For Chemical MCQs

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 ✔

Option A: Isolated

Option B: Open

Option C: Insulated

Option D: Closed

Correct Answer: Closed ✔

Option A: Ideal

Option B: Real

Option C: Isotonic

Option D: None of these

Correct Answer: Ideal ✔

Option A: P ∝ 1/V, when temperature is constant

Option B: P ∝ 1/V, when temperature & mass of the gas remain constant

Option C: P ∝ V, at constant temperature & mass of the gas

Option D: P/V = constant, for any gas

Correct Answer: P ∝ 1/V, when temperature & mass of the gas remain constant ✔

Option A: More

Option B: Less

Option C: Same

Option D: Data insufficient to predict

Correct Answer: More ✔

Option A: Increases

Option B: Decreases

Option C: Remains unchanged

Option D: First decreases and then increases

Correct Answer: Increases ✔

Option A: Reversible and isothermal

Option B: Isothermal and irreversible

Option C: Reversible and adiabatic

Option D: Adiabatic and irreversible

Correct Answer: Reversible and adiabatic ✔

Option A: Unity

Option B: Zero

Option C: That of the heat of reaction

Option D: Infinity

Correct Answer: Zero ✔

Option A: Concentration

Option B: Mass

Option C: Temperature

Option D: Entropy

Correct Answer: Entropy ✔

Option A: More

Option B: Less

Option C: Same

Option D: Unpredictable; depends on the particular reaction

Correct Answer: Same ✔

Option A: Less than

Option B: More than

Option C: Same as

Option D: Not related to

Correct Answer: Same as ✔

Option A: Below

Option B: At

Option C: Above

Option D: Either B. or C.

Correct Answer: Below ✔

Option A: P + F – C = 2

Option B: C = P – F + 2

Option C: F = C – P – 2

Option D: P = F – C – 2

Correct Answer: A. P + F – C = 2 ✔

Option A: Minimum

Option B: Zero

Option C: Maximum

Option D: Indeterminate

Correct Answer: Zero ✔

Option A: Zeroth

Option B: First

Option C: Second

Option D: Third

Correct Answer: Second ✔

Option A: dE = CpdT

Option B: dE = CvdT

Option C: dQ = dE + pdV

Option D: dW = pdV

Correct Answer: dE = CvdT ✔

Option A: Pressure

Option B: Volume

Option C: Mass

Option D: None of these

Correct Answer: Volume ✔

Option A: ∞

Option B: +ve

Option C: 0

Option D: -ve

Correct Answer: 0 ✔

Option A: Volume

Option B: Temperature

Option C: Pressure

Option D: None of these

Correct Answer: Volume ✔

Option A: Zero

Option B: 50%

Option C: Almost 100%

Option D: unpredictable

Correct Answer: Almost 100% ✔

Option A: +ve

Option B: -ve

Option C: 0

Option D: ∞

Correct Answer: 0 ✔

Option A: 1.572

Option B: 1.9398

Option C: 3.389

Option D: 4.238

Correct Answer: 1.572 ✔

Option A: Helmholtz

Option B: Gibbs

Option C: Both A. & B.

Option D: Neither A. nor B.

Correct Answer: C. Both A. & B. ✔

Option A: 0

Option B: ∞

Option C: 50

Option D: 100

Correct Answer: ∞ ✔

Option A: V1/V2

Option B: V2/V1

Option C: V1 – V2

Option D: V1.V2

Correct Answer: V1/V2 ✔

Option A: Contracts

Option B: Expands

Option C: Does not change in volume

Option D: Either (A), B. or (C)

Correct Answer: Contracts ✔

Option A: Zero

Option B: One

Option C: Two

Option D: Three

Correct Answer: One ✔

Option A: The surface tension vanishes

Option B: Liquid and vapour have the same density

Option C: There is no distinction between liquid and vapour phases

Option D: All A, B. and C

Correct Answer: D. All A, B. and C ✔

Option A: 0

Option B: 1

Option C: 2

Option D: 3

Correct Answer: 0 ✔

Option A: 0

Option B: 1

Option C: 2

Option D: 3

Correct Answer: 2 ✔

Option A: With pressure changes at constant temperature

Option B: Under reversible isothermal volume change

Option C: During heating of an ideal gas

Option D: During cooling of an ideal gas

Correct Answer: With pressure changes at constant temperature ✔

Option A: Superheated vapour

Option B: Partially condensed vapour with quality of 0.9

Option C: Saturated vapour

Option D: Partially condensed vapour with quality of 0.1

Correct Answer: Superheated vapour ✔

Option A: -19.4

Option B: -30.2

Option C: 55.2

Option D: -55.2

Correct Answer: -19.4 ✔

Option A: Molten sodium

Option B: Molten lead

Option C: Mercury

Option D: Molten potassium

Correct Answer: Molten sodium ✔

Option A: Specific heat

Option B: Latent heat of vaporisation

Option C: Viscosity

Option D: Specific vapor volume

Correct Answer: Viscosity ✔

Option A: Entropy

Option B: Gibbs energy

Option C: Internal energy

Option D: Enthalpy

Correct Answer: Gibbs energy ✔

Option A: It is exothermic

Option B: It is isenthalpic

Option C: It takes place isothermally

Option D: It takes place at constant volume

Correct Answer: It is exothermic ✔

Option A: Heat absorbed

Option B: Work done

Option C: Both A. & B

Option D: Neither A. nor B

Correct Answer: Heat absorbed ✔

Option A: 0

Option B: 273

Option C: 25

Option D: None of these

Correct Answer: 0 ✔

Option A: Two different gases behave similarly, if their reduced properties (i.e. P, V and T) are same

Option B: The surface of separation (i. e. the meniscus) between liquid and vapour phase disappears at

Option C: No gas can be liquefied above the critical temperature, howsoever high the pressure may be.

Option D: The molar heat of energy of gas at constant volume should be nearly constant (about 3

Correct Answer: Two different gases behave similarly, if their reduced properties (i.e. P, V and T) are same ✔

Option A: Free expansion of a gas

Option B: Compression of air in a compressor

Option C: Expansion of steam in a turbine

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

Correct Answer: Free expansion of a gas ✔

Option A: Pressure

Option B: Temperature

Option C: Both A. & B

Option D: Neither A. nor B

Correct Answer: C. Both A. & B ✔

Option A: λb/Tb

Option B: Tb/λb

Option C: √(λb/Tb)

Option D: √(Tb/λb)

Correct Answer: λb/Tb ✔

Option A: Solution

Option B: Formation

Option C: Dilution

Option D: Combustion

Correct Answer: Solution ✔

Option A: The melting point of wax

Option B: The boiling point of a liquid

Option C: Both A. and B

Option D: Neither A. nor B

Correct Answer: C. Both A. and B ✔

Option A: Critical properties

Option B: Specific gravity

Option C: Specific volume

Option D: Thermal conductivity

Correct Answer: Critical properties ✔

Option A: T = [RT/(V- b)] – [a/√T. V(V + b)]

Option B: PV/RT = 1 + (B/V) + (C/V2) + ……

Option C: n1u2 + μ2μ1 = 0

Option D: None of these

Correct Answer: PV/RT = 1 + (B/V) + (C/V2) + …… ✔

Option A: 5 & 3

Option B: 3.987 & 1.987

Option C: 1.987 & 0.66

Option D: 0.66 & 1.987

Correct Answer: 5 & 3 ✔

Option A: Lowest

Option B: Highest

Option C: Average

Option D: None of these

Correct Answer: Lowest ✔

Option A: Molecular size

Option B: Temperature

Option C: Volume

Option D: Pressure

Correct Answer: Temperature ✔

Option A: 6738.9

Option B: 6753.5

Option C: 7058.3

Option D: 9000

Correct Answer: 6753.5 ✔

Option A: Maxwell’s equation

Option B: Clausius-Clapeyron Equation

Option C: Van Laar equation

Option D: Nernst Heat Theorem

Correct Answer: Clausius-Clapeyron Equation ✔

Option A: High thermal conductivity

Option B: Low freezing point

Option C: Large latent heat of vaporisation

Option D: High viscosity

Correct Answer: High viscosity ✔

Option A: Equilibrium

Option B: Adiabatic

Option C: Steady

Option D: Unsteady

Correct Answer: Unsteady ✔

Option A: 0

Option B: 1

Option C: 2

Option D: 3

Correct Answer: 0 ✔

Option A: Increases

Option B: Decreases

Option C: Remains unchanged

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

Correct Answer: Remains unchanged ✔

Option A: Isochoric

Option B: Isobaric

Option C: Adiabatic

Option D: Isothermal

Correct Answer: Isobaric ✔

Option A: At constant pressure, solubility of a gas in a liquid diminishes with rise in temperature

Option B: Normally, the gases which are easily liquefied are more soluble in common solvents

Option C: The gases which are capable of forming ions in aqueous solution are much more soluble in

Option D: At constant pressure, solubility of a gas in a liquid increases with rise in temperature

Correct Answer: At constant pressure, solubility of a gas in a liquid diminishes with rise in temperature ✔

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: Does not need the addition of external work for its functioning

Option B: Transfers heat from high temperature to low temperature

Option C: Accomplishes the reverse effect of the heat engine

Option D: None of these

Correct Answer: Accomplishes the reverse effect of the heat engine ✔

Option A: Increases, for an exothermic reaction

Option B: Decreases, for an exothermic reaction

Option C: Increases, for an endothermic reaction

Option D: None of these

Correct Answer: Increases, for an exothermic reaction ✔

Option A: Gibbs-Duhem

Option B: Van Laar

Option C: Gibbs-Helmholtz

Option D: Margules

Correct Answer: Gibbs-Duhem ✔

Option A: The concentration of each component should be same in the two phases

Option B: The temperature of each phase should be same

Option C: The pressure should be same in the two phases

Option D: The chemical potential of each component should be same in the two phases

Correct Answer: The chemical potential of each component should be same in the two phases ✔

Option A: Activity

Option B: Fugacity

Option C: Activity co-efficient

Option D: Fugacity co-efficient

Correct Answer: Activity ✔

Option A: Constant volume

Option B: Polytropic

Option C: Adiabatic

Option D: Constant pressure

Correct Answer: Constant volume ✔

Option A: Simultaneous pressure & temperature change

Option B: Heating

Option C: Cooling

Option D: Both B. and C

Correct Answer: D. Both B. and C ✔

Option A: 1

Option B: 2

Option C: 3

Option D: 4

Correct Answer: 2 ✔

Option A: RT d ln P

Option B: RT d ln f

Option C: R d ln f

Option D: None of these

Correct Answer: RT d ln f ✔

Option A: RT ln K

Option B: -RT ln K

Option C: -R ln K

Option D: T ln K

Correct Answer: RT ln K ✔

Option A: Shift the equilibrium towards right

Option B: Give higher yield of NH3

Option C: Both B. and C

Option D: Neither A. nor B

Correct Answer: C. Both B. and C ✔

Option A: Stirling

Option B: Brayton

Option C: Rankine

Option D: Both B. and C

Correct Answer: D. Both B. and C ✔

Option A: Isothermal

Option B: Isentropic

Option C: Isobaric

Option D: Adiabatic

Correct Answer: Adiabatic ✔

Option A: Expansion of a real gas

Option B: Reversible isothermal volume change

Option C: Heating of an ideal gas

Option D: Cooling of a real gas

Correct Answer: Reversible isothermal volume change ✔

Option A: State functions

Option B: Path functions

Option C: Intensive properties

Option D: Extensive properties

Correct Answer: Path functions ✔

Option A: (atm)Δx, when Δx is negative

Option B: (atm)Δx, when Δx is positive

Option C: Dimensionless, when Δx = 0

Option D: (atm)Δx2, when Δx > 0

Correct Answer: (atm)Δx2, when Δx > 0 ✔

Option A: Decreases

Option B: Decreases exponentially

Option C: Increases

Option D: Remain constant

Correct Answer: Increases ✔

Option A: CV

Option B: Enthalpy change

Option C: Free energy change

Option D: None of these

Correct Answer: None of these ✔