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Chemical Engineering MCQs with Explanations

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2041Chemical EngineeringMedium

Which of the following has the maximum °API gravity of all?

AFurnace oil

Kerosene

CDiesel

DPetrol

Correct answer

D. Petrol

Explanation

The correct answer is Petrol.

2042Chemical EngineeringMedium

Pick out the wrong statement?

ACO2 is the strongest paramagnetic gas

BParamagnetic susceptibility of gases decreases with temperature

CParamagnetic susceptibility of gases permits the measurement of their concentration

DO2, NO and NO2 exhibit paramagnetic properties as a result of unpaired electrons

Correct answer

A. CO2 is the strongest paramagnetic gas

Explanation

The correct answer is CO2 is the strongest paramagnetic gas.

2043Chemical EngineeringMedium

Catalyst used in desulphurisation of naphtha is________?

APt-Rh

BSilica gel

CNickel

DCo-Mo

Correct answer

D. Co-Mo

Explanation

The correct answer is Co-Mo.

2044Chemical EngineeringMedium

With increase in pressure (above atmospheric pressure), the Cp of a gas________?

ADecreases

BFirst decreases and then increases

CRemains unchanged

DIncreases

Correct answer

D. Increases

Explanation

The correct answer is Increases.

2045Chemical EngineeringMedium

Hammers and railway rails are normally made of________?

AMedium carbon steel

BMild steel

CDead mild steel

DHigh carbon steel

Correct answer

D. High carbon steel

Explanation

The correct answer is High carbon steel.

2046Chemical EngineeringMedium

Naphthalene is removed from coke oven gas by________?

AAbsorbing in vetro-coke solution

BNone of these

CScrubbing with wash oil (a petroleum product)

DAdsorbing on bog iron bed

Correct answer

C. Scrubbing with wash oil (a petroleum product)

Explanation

The correct answer is Scrubbing with wash oil (a petroleum product).

2047Chemical EngineeringMedium

Condensation polymerisation of caprolactam is carried out in the reactor maintained at a temperature of ________ °C for producing nylon-6?

A100 to 150

B50 to 75

C250-280

D-20 to 25

Correct answer

C. 250-280

Explanation

The correct answer is 250-280.

2048Chemical EngineeringMedium

Iron & manganese present as pollutant in water cannot be removed by________?

AChlorination

BIon exchange process

COxidation followed by settling & filtration

DLime soda process or manganese zeolite process

Correct answer

A. Chlorination

Explanation

The correct answer is Chlorination.

2049Chemical EngineeringMedium

For a perfectly transparent surface (like gases), the________?

AReflectivity = 0

BAll A., B. & C.

CAbsorptivity = 0

DTransmissivity = 1

Correct answer

D. Transmissivity = 1

Explanation

The correct answer is Transmissivity = 1.

2050Chemical EngineeringMedium

Enamels________?

AAre same as varnish

BAre prepared from non-drying oil

CGive good glossy finish

DDo not contain pigment

Correct answer

C. Give good glossy finish

Explanation

The correct answer is Give good glossy finish.

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