MCQs

Chemical Engineering MCQs with Explanations

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1911Chemical EngineeringMedium

The expression, ΔG = nRT. ln(P2/P1), gives the free energy change________?

AWith pressure changes at constant temperature

BDuring heating of an ideal gas

CDuring cooling of an ideal gas

DUnder reversible isothermal volume change

Correct answer

A. With pressure changes at constant temperature

Explanation

The correct answer is With pressure changes at constant temperature.

1912Chemical EngineeringMedium

The number of neutrons accompanying the formation of 54Xe139 and 38Sr94 from the absorption of a slow neutron by 92U235, followed by nuclear fission is ________?

Correct answer

C. 3

Explanation

The correct answer is 3.

1913Chemical EngineeringMedium

Stefan’s law describes the mass transfer by________?

ANeither A. nor B.

BBoth A. & B.

CBulk flow

DDiffusion

Correct answer

B. Both A. & B.

Explanation

The correct answer is Both A. & B..

1914Chemical EngineeringMedium

In an ideal solution, the activity of a component equals its ________?

APartial pressure

BMole fraction

CNone of these

DFugacity at the same temperature and pressure

Correct answer

B. Mole fraction

Explanation

The correct answer is Mole fraction.

1915Chemical EngineeringMedium

In liquid-liquid extraction, the number of phases at plait point is ________?

Correct answer

C. 1

Explanation

The correct answer is 1.

1916Chemical EngineeringMedium

Electrochemical corrosion can occur, only if ________ is present in contact with metal?

AGaseous medium

BLiquid medium

COxygen

DAir

Correct answer

B. Liquid medium

Explanation

The correct answer is Liquid medium.

1917Chemical EngineeringMedium

The dimension of diffusivity is same as that of the________?

ADensity

BVelocity head

CMolal concentration

DKinematic viscosity

Correct answer

D. Kinematic viscosity

Explanation

The correct answer is Kinematic viscosity.

1918Chemical EngineeringMedium

Cementite is________?

AAll A., B. and C.

BA compound of carbon and iron

CCharacterised by an orthorhombic crystal structure

DFe3C chemically

Correct answer

A. All A., B. and C.

Explanation

The correct answer is All A., B. and C..

1919Chemical EngineeringMedium

Which of the following does not require preheating during storage in the storage tank as well as during atomisation through burners?

APCM

BLow viscosity furnace oil

CLight diesel oil

DTar

Correct answer

C. Light diesel oil

Explanation

The correct answer is Light diesel oil.

1920Chemical EngineeringMedium

________are produced by reacting polybasic acid (e.g. Phthalic anhydride) with polyhydric alcohol (e.g., glycerol)?

AAmino resins

BUnsaturated polyester

CAlkyd resins

DSaturated polyester

Correct answer

C. Alkyd resins

Explanation

The correct answer is Alkyd resins.

1911Chemical EngineeringMedium

The expression, ΔG = nRT. ln(P2/P1), gives the free energy change________?

AWith pressure changes at constant temperature

BDuring heating of an ideal gas

CDuring cooling of an ideal gas

DUnder reversible isothermal volume change

Correct answer

A. With pressure changes at constant temperature

Explanation

The correct answer is With pressure changes at constant temperature.

1912Chemical EngineeringMedium

The number of neutrons accompanying the formation of 54Xe139 and 38Sr94 from the absorption of a slow neutron by 92U235, followed by nuclear fission is ________?

Correct answer

C. 3

Explanation

The correct answer is 3.

1913Chemical EngineeringMedium

Stefan’s law describes the mass transfer by________?

ANeither A. nor B.

BBoth A. & B.

CBulk flow

DDiffusion

Correct answer

B. Both A. & B.

Explanation

The correct answer is Both A. & B..

1914Chemical EngineeringMedium

In an ideal solution, the activity of a component equals its ________?

APartial pressure

BMole fraction

CNone of these

DFugacity at the same temperature and pressure

Correct answer

B. Mole fraction

Explanation

The correct answer is Mole fraction.

1915Chemical EngineeringMedium

In liquid-liquid extraction, the number of phases at plait point is ________?

Correct answer

C. 1

Explanation

The correct answer is 1.

1916Chemical EngineeringMedium

Electrochemical corrosion can occur, only if ________ is present in contact with metal?

AGaseous medium

BLiquid medium

COxygen

DAir

Correct answer

B. Liquid medium

Explanation

The correct answer is Liquid medium.

1917Chemical EngineeringMedium

The dimension of diffusivity is same as that of the________?

ADensity

BVelocity head

CMolal concentration

DKinematic viscosity

Correct answer

D. Kinematic viscosity

Explanation

The correct answer is Kinematic viscosity.

1918Chemical EngineeringMedium

Cementite is________?

AAll A., B. and C.

BA compound of carbon and iron

CCharacterised by an orthorhombic crystal structure

DFe3C chemically

Correct answer

A. All A., B. and C.

Explanation

The correct answer is All A., B. and C..

1919Chemical EngineeringMedium

Which of the following does not require preheating during storage in the storage tank as well as during atomisation through burners?

APCM

BLow viscosity furnace oil

CLight diesel oil

DTar

Correct answer

C. Light diesel oil

Explanation

The correct answer is Light diesel oil.

1920Chemical EngineeringMedium

________are produced by reacting polybasic acid (e.g. Phthalic anhydride) with polyhydric alcohol (e.g., glycerol)?

AAmino resins

BUnsaturated polyester

CAlkyd resins

DSaturated polyester

Correct answer

C. Alkyd resins

Explanation

The correct answer is Alkyd resins.