Chemical Reaction MCQs

188 MCQs  — Chemical Engineering MCQs  (Page 17 of 19)

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.
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
For a tubular reactor with space time ‘η’ and residence time ‘ζ’, the following statement holds good ?
A. Η and θ are always equal
B. Η = θ, when the fluid density changes in the reactor
C. Η = θ, for an isothermic tubular reactor in which the density of the process fluid is constant
D. Η = θ, for a non-isothermal reactor
The catalyst in a first order chemical reaction changes the_________________?
A. Equilibrium constant
B. Activation energy
C. Heat of formation of the product
D. Heat of reaction
Differential method for analysing the kinetic data is used ___________________?
A. For testing complicated mechanisms
B. When the data are scattered
C. When rate expressions are very simple
D. None of these
Which of the following is not endothermic in nature ?
A. Combustion of sulphur
B. Gasification of carbon
C. Thermal cracking of fuel oil
D. Steam reforming of naphtha