Chemical Engineering Mcqs

When a catalyst increases the rate of forward reaction, the value of rate constant__________________?

(A) Increases
(B) Decreases
(C) Remain same
(D) Becomes infinite

Submitted By :Ali Uppal

For nearly isothermal operation involving large reaction time in a liquid-phase reaction, the most suitable reactor is a _________________ reactor?

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

Submitted By :Ali Uppal

With decrease in temperature, the equilibrium conversion of a reversible endothermic reaction_________________?

(A) Decreases
(B) Increases
(C) Remain unaffected
(D) Increases linearly with temperature

Submitted By :Ali Uppal

In a chemical reaction, _____________________ are conserved?

(A) Ions
(B) Masses
(C) Atoms
(D) Both

Submitted By :Ali Uppal

Sulphuric acid is used as a catalyst in the_______________?

(A) Hydrogenation of oils
(B) Gas phase oxidation of SO2 in chamber process
(C) Alkylation of hydrocarbons
(D) None of these

Submitted By :Ali Uppal

An autothermal reactor is_________________?

(A) Most suitable for a second order reaction
(B) Most suitable for a reversible reaction
(C) Completely self-supporting in its thermal energy requirements
(D) Isothermal in nature

Submitted By :Ali Uppal

Which of the following will favour the reverse reaction in a chemical equilibrium reaction ?

(A) Increasing the concentration of one of the reactants
(B) Increasing the concentration of one or more of the products
(C) Removal of at least one of the products at regular interval
(D) None of these

Submitted By :Ali Uppal

For a vapour phase catalytic reaction (A + B → P) which follows the Ridel mechanism and the reaction step is rate controlling, the rate of reaction is given by (reaction rate is irreversible, product also absorbs) ?

(A) -rA = (k . PA . PB)/(1 + KAPA + KPPP)
(B) -rA = (k . PA 2 – k1PP)/(1 + KAPA + KPPP)
(C) -rA = (k . PA . PB)/(1 + KAPB + KBPB . KPPP)
(D) -rA = (k . PA . PB)/(1 + KAPA)

Submitted By :Ali Uppal

At a given temperature, K1, K2 and K3 are equilibrium constants for the following reactions 1, 2, 3 respectively. CH4(g) + H2O(g) ⇌ CO(g) + 3H2(g), CO(g) + H2O(g) ⇌ CO2(g) + H2(g) CH4(g) + 2H2O(g) ⇌ CO2(g) + 4H2(g) Then K1, K2 and K3 are related as ?

(A) K3 = K1.K2
(B) K3 = (K1.K2)0.5
(C) K3(K1+K2)/2
(D) K3 = (K1.K2)2

Submitted By :Ali Uppal

The rate of a chemical reaction is almost doubled for every 10°C rise in temperature. The rate will increase ______________ times, if the temperature rises from 10 to 100°C?

(A) 256
(B) 512
(C) 112
(D) 612

Submitted By :Ali Uppal

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