Chemical Engineering Mcqs

In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will________________?

(A) Remain the same
(B) Be halved
(C) Also be doubled
(D) Become one fourth

Submitted By :Ali Uppal

Catalyst carriers___________________?

(A) Have very high selectivity
(B) Increase the activity of a catalyst
(C) Provide large surface area with a small amount of active material
(D) Inhibit catalyst poisoning

Submitted By :Ali Uppal

Rate determining step in a reaction consisting of a number of steps in series is the ______________ step?

(A) Fastest
(B) Slowest
(C) Intermediate
(D) Data insufficient; can’t be predicted

Submitted By :Ali Uppal

For the liquid phase zero order irreversible reaction A → B, the conversion of A in a CSTR is found to be 0.3 at a space velocity of 0.1min-1. What will be the conversion for a PFR with a space velocity of 0.2 min-1? Assume that all the other operating conditions are the same for CSTR and PFR ?

(A) 0.15
(B) 0.30
(C) 0.60
(D) 0.90

Submitted By :Ali Uppal

A reaction in which one of the products of reaction acts as a catalyst is called a/an ______________ reaction?

(A) Catalytic
(B) Autocatalytic
(C) Photochemical
(D) None of these

Submitted By :Ali Uppal

Which of the following is an independent variable for a batch tank reactor with uniform concentration and temperature ?

(A) Time
(B) Useful volume of the tank
(C) Diameter of the reactor
(D) None of these

Submitted By :Ali Uppal

When all the limiting reactant is consumed in the reaction, the operational yield _______________ the relative yield?

(A) Is greater than
(B) Is smaller than
(C) Equals
(D) Can be either greater or smaller than (depends on the type of reaction)

Submitted By :Ali Uppal

In flow reactors, the performance equations interrelate the rate of reaction to the___________________?

(A) Feed rate
(B) Reactor volume
(C) Extent of reaction
(D) All

Submitted By :Ali Uppal

In an ideal tubular-flow reactor_________________?

(A) There is no mixing in longitudinal direction
(B) Mixing takes place in radial direction
(C) There is a uniform velocity across the radius
(D) All

Submitted By :Ali Uppal

In a/an ______________ reactor, there is exchange of heat with the surroundings with sizeable temperature variation?

(A) Adiabatic
(B) Isothermal
(C) Non-adiabatic
(D) None of these

Submitted By :Ali Uppal

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