MCQs

Chemical Engineering MCQs with Explanations

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3801Chemical EngineeringMedium

Which of the following sugars is the sweetest?

AGlucose

BLactose

CSucrose

DFructose

Correct answer

D. Fructose

Explanation

The correct answer is Fructose.

3802Chemical EngineeringMedium

The forces causing the vaporisation of liquid are derived from the Kinetic energy of translation of its molecules. The heat of vaporisation________?

AIncreases with pressure rise

BBecomes zero at the critical point

CDecreases with increasing pressure

DBoth B. & C.

Correct answer

D. Both B. & C.

Explanation

The correct answer is Both B. & C..

3803Chemical EngineeringMedium

The blades of a centrifugal impeller are said to be curved forward, if the ________ of the motion of impeller blades?

AInlet tip of a blade curves in a direction opposite to that

BOutlet tip of a blade is towards the direction

CInlet tip of a blade is towards the direction

DOutlet tip of a blade curves in a direction opposite to that

Correct answer

B. Outlet tip of a blade is towards the direction

Explanation

The correct answer is Outlet tip of a blade is towards the direction.

3804Chemical EngineeringMedium

A solution having a pH value of 5 is less acidic than the one having a pH value of 2 by a factor of ________?

ANone of these

B100

C1000

Correct answer

C. 1000

Explanation

The correct answer is 1000.

3805Chemical EngineeringMedium

Which of the following pairs is not correctly matched?

ANumber of nucleons : Mass number

BBinding energy : Mass defect

CUranium – 233 : Fertile material

DScattering: Absorption cross-section

Correct answer

C. Uranium – 233 : Fertile material

Explanation

The correct answer is Uranium – 233 : Fertile material.

3806Chemical EngineeringMedium

The number of kg vaporised per kg of steam fed to the evaporator is defined as________?

AEconomy

BRate of vaporisation

CCapacity

DRate of evaporation

Correct answer

A. Economy

Explanation

The correct answer is Economy.

3807Chemical EngineeringMedium

When a catalyst increases the rate of chemical reaction, the rate constant________?

AIncreases

BRemain constant

CDecreases

DBecome infinite

Correct answer

A. Increases

Explanation

The correct answer is Increases.

3808Chemical EngineeringMedium

Differential method for analysing the kinetic data is used ________?

AWhen the data are scattered

BFor testing complicated mechanisms

CNone of these

DWhen rate expressions are very simple

Correct answer

B. For testing complicated mechanisms

Explanation

The correct answer is For testing complicated mechanisms.

3809Chemical EngineeringMedium

The decrease in the atomic number is not observed in case of________?

Aα-emission

Bβ-emission

CPositron emission

DElectron capture

Correct answer

B. β-emission

Explanation

The correct answer is β-emission.

3810Chemical EngineeringMedium

The ‘transition temperature’ for ductile to brittle behavior of steel increases with increase in the ________ content in steel?

ABoth A nor B

BNeither A nor B

CCarbon

DManganese

Correct answer

C. Carbon

Explanation

The correct answer is Carbon.

The blades of a centrifugal impeller are said to be curved forward, if the ________ of the motion of impeller blades?

AInlet tip of a blade curves in a direction opposite to that

BOutlet tip of a blade is towards the direction

CInlet tip of a blade is towards the direction

DOutlet tip of a blade curves in a direction opposite to that

Correct answer

B. Outlet tip of a blade is towards the direction

Explanation

The correct answer is Outlet tip of a blade is towards the direction.