CHEMICAL REACTION ENGINEERING QUIZ

Half life period of a first order irreversible reaction A → B is

Ln k/2

K/2

Ln 2/k

Ln 0.5/k

TRUE ANSWER : ?
YOUR ANSWER : ?

N' plug flow reactors in series with a total volume 'V' gives the same conversion as a single plug flow reactor of volume 'V' for __________ order reactions.

Any

First

Second

Third

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not endothermic in nature?

Combustion of sulphur

Steam reforming of naphtha

Gasification of carbon

Thermal cracking of fuel oil

TRUE ANSWER : ?
YOUR ANSWER : ?

For a solid catalysed chemical reaction, the effectiveness of solid catalyst depends upon the __________ adsorption.

Physical

Neither A nor B

Both A and B

Chemical

TRUE ANSWER : ?
YOUR ANSWER : ?

A high space velocity means that a given

None of these

Conversion can be obtained with a high feed rate

Both A and B

Reaction can be accomplished with small reactor

TRUE ANSWER : ?
YOUR ANSWER : ?

Rate constant 'k' and absolute temperature 'T' are related by collision theory (for bimolecular) as

k ∝ T

k ∝ exp(-E/RT)

k ∝ T1.5

k ∝ √T

TRUE ANSWER : ?
YOUR ANSWER : ?

Carbon particles accummulated on the catalyst used in the gas oil cracking lies in the category of __________ poison.

Stability

Chemisorbed

Deposited

Selectivity

TRUE ANSWER : ?
YOUR ANSWER : ?

The experimentally determined overall order of the reaction, A + B → C + D, is two. Then the

Reaction is elementary but the molecularity may not be 2

Reaction may be elementary with molecularity of 2

Molecularity of the reaction is 2, but the reaction may not be elementary

Reaction is elementary with a molecularity of 2

TRUE ANSWER : ?
YOUR ANSWER : ?

Threshold energy in a reaction is equal to the

Normal energy of reactants

Sum of A & B

Neither A nor B

Activation energy

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following curves shows the effect of temperature on the extent of gas-solid adsorption at a given pressure?

Adsorption isobar

None of these

Freundlich adsorption isotherm

Langmuir adsorption isotherm

TRUE ANSWER : ?
YOUR ANSWER : ?

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