Chemical Engineering Mcqs

What is the order of chemical reaction as shown in the bellow figure, if it is found that the reaction rate doubles on doubling the concentration of B and also the reaction rate doubles when the concentrations of both A & B were doubled and quadrupled when the concentrations of both B & C were doubled ?

(A) 1
(B) 2
(C) 3
(D) 4

Submitted By :Ali Uppal

For the reaction, A + B → 2B + C,___________________?

(A) rA = rB
(B) rA = -rB
(C) rA = 2rB
(D) rA = rB/2

Submitted By :Ali Uppal

The reaction rate constants at two different temperatures T1 and T2 are related by _________________?

(A) ln (k2/k1) = (E/R) (1/T2 – 1/T1)
(B) ln (k2/k1) = (E/R) (1/T1 – 1/T2)
(C) exp (k2/k1) = (E/R) (1/T2 – 1/T1)
(D) exp (k2/k1) = (E/R) (1/T1 – 1/T2)

Submitted By :Ali Uppal

The size of plug flow reactor (PFR) for all positive reaction orders and for any given duty, is _____________________ that of mixed reactor?

(A) Greater than
(B) Equal to
(C) Smaller than
(D) Unpredictable from the data

Submitted By :Ali Uppal

For the liquid phase parallel reactions__________________?

(A) Low temperature in a CSTR
(B) High temperature in a CSTR
(C) Low temperature in a PFR
(D) High temperature in a PFR

Submitted By :Ali Uppal

Organic catalysts differ from the inorganic catalyst in the sense that the former is________________?

(A) Active at cryogenic temperatures only
(B) Prohibitively costly
(C) Proteinous in nature
(D) Active at very high temperature only

Submitted By :Ali Uppal

In Langmuir treatment of adsorption,_________________?

(A) Whole surface of the catalyst does not have the same activity for adsorption and there is attraction between the adsorbed molecule
(B) Whole surface of the catalyst is essentially uniform and the adsorbed molecule has no effect on the rate of adsorption per site
(C) All the adsorption does not take place by the same mechanism
(D) Extent of adsorption is more than one complete monomolecular layer on the surface

Submitted By :Ali Uppal

A non-catalytic chemical reaction of the type as shown in the bellow figure is called a _____________ reaction?

(A) Parallel
(B) Series
(C) Series-parallel
(D) None of these

Submitted By :Ali Uppal

A first order homogeneous reaction of the type X → Y → Z (consecutive reaction) is carried out in a CSTR. Which of the following curves respectively show the variation of the concentration of X, Y and Z with time ?

(A) I, II, III
(B) III, II, I
(C) III, I, II
(D) II, III, I

Submitted By :Ali Uppal

Which of the following will give maximum gas conversion ?

(A) Fixed bed reactor
(B) Fluidised bed reactor
(C) Semi-fluidised bed reactor
(D) Plug-flow catalytic reactor

Submitted By :Ali Uppal

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