Chemical Engineering MCQs

6108 MCQs  (Page 280 of 611)

Attempt Chemical Engineering Quiz
In a CSTR _______________ varies with time ?
A. Reaction rate
B. Concentration
C. Both a. & b.
D. Neither a. nor b.
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The rate of a gas phase reaction is given by K . CA . CB. If the volume of the reaction vessel is reduced to l/4th of its initial volume, then the reaction rate compared to the original rate will be _______________ times?
A. 4
B. 16
C. 8
D. 2
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A plug-flow reactor is characterized by _____________________?
A. High capacity
B. Presence of axial mixing
C. Presence of lateral mixing
D. Constant composition and temperature of reaction mixture
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In which of the following reactions, the equilibrium will shift to the right, if the total pressure is increased ?
A. H2 + cl2 ⇌ 2hcl
B. N2 + o2 ⇌ 2no
C. N2o4 ⇌ 2 no2
D. H2 + i2 ⇌ 2hi
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A chemical reaction, A → 3B, is conducted in a constant pressure vessel. Starting with pure A, the volume of the reaction mixture increases 3 times in 6 minutes. The fractional conversion is ___________________?
A. 0.33
B. 0.5
C. 1
D. Data insufficient, can’t be predicted
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In the fluid catalytic cracker (FCC), the cracking reaction is _____________ (i) and the regeneration is _______________ (ii) _______________?
A. (i) exothermic (ii) endothermic
B. (i) exothermic (ii) exothermic
C. (i) endothermic (ii) endothermic
D. (i) endothermic (ii) exothermic
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Effectiveness factor of a catalyst pellet is a measure of the _________________ resistance?
A. Pore diffusion
B. Gas film
C. Chemical reaction
D. None of these
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BET apparatus is used to determine the ___________________?
A. Specific surface of a porous catalyst
B. Pore size distribution
C. Pore diameter
D. Porosity of the catalyst bed
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A rise in temperature ______________________?
A. Normally tends to increase the reaction rate
B. Does not affect a catalysed reaction
C. Does not affect photo-chemical reaction rates
D. All a., b. and c.
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If ‘n’ is the order of reaction, then unit of rate constant is _________________?
A. 1/(time)(concentration)n – 1
B. (time)-1 (concentration)n – 1
C. (time)n – 1 (concentration)
D. None of these
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Word of the Day
28 Jul
Fragile
(of an object) easily broken or damaged.
نازک، کاغذی، آسانی سے ٹوٹ جانیوالا

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