Chemical Engineering Mcqs

For the irreversible elementary reactions in parallel as shown in the bellow figure, the rate of disappearance of ‘X’ is equal to_______________?

(A) CA (K1 + K2)
(B) CA (K1 + K2)/2
(C) CA . K1/2
(D) CA . K2/2

Submitted By :Ali Uppal

Fractional conversion _____________ with increase in pressure for ammonia synthesis reaction i.e., N2 + 3H2 ⇌ 2NH3?

(A) Increases
(B) Decreases
(C) Remains unchanged
(D) Unpredictable from the data

Submitted By :Ali Uppal

A first order irreversible reaction, A → B is carried out separately in a constant volume as well as in a variable volume reactor for a particular period. It signifies that _____________ in the two reactors?

(A) Both conversion as well as concentration are same
(B) Conversion in both will be the same but concentrations will be different
(C) Both the conversion as well as concentrations will be different
(D) None of these

Submitted By :Ali Uppal

Which of the following is used for calcination of limestone and dolomite in industrial practice?

(A) Fluidised bed reactor
(B) Moving bed reactor
(C) Fixed bed reactor
(D) None of these

Submitted By :Ali Uppal

A chemical reaction is of zero order, when the reaction rate is (where, CA = concentration of reactant) ?

(A) ∝ CA
(B) ∝ 1/CA
(C) Independent of temperature
(D) None of these

Submitted By :Ali Uppal

The increase in the rate of reaction with temperature is due to__________________?

(A) Increase in the number of effective collisions
(B) Decrease in activation energy
(C) Increase in the average kinetic energy of the reacting molecules
(D) None of these

Submitted By :Ali Uppal

In a consecutive reaction system of the given figure bellow, when E1 is much greater than E2, the yield of B increases with the____________________?

(A) Increase of temperature
(B) Decrease of temperature
(C) Increase in initial concentration of A
(D) Decrease in initial concentration of A

Submitted By :Ali Uppal

Helium-mercury method can be used to determine the _____________ of the catalyst particle?

(A) Pore volume
(B) Solid density
(C) Porosity
(D) All

Submitted By :Ali Uppal

Which of the following is the most suitable for very high pressure gas phase reaction ?

(A) Batch reactor
(B) Tubular flow reactor
(C) Stirred tank reactor
(D) Fluidised bed reactor

Submitted By :Ali Uppal

Half life period of a chemical reaction is_________________?

(A) The time required to reduce the concentration of the reacting substance to half its initial value
(B) Half of the space time of a reaction
(C) Half of the residence time of a reaction
(D) None of these

Submitted By :Ali Uppal

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