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Chemical Reaction Engineering

Chemical Reaction Engineering
A chemical reaction is of zero order, when the reaction rate is (where, CA = concentration of reactant)

∝ 1/CA
∝ CA
None of these
Independent of temperature

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Chemical Reaction Engineering
At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenious law is used. What will be this ratio, if transition state theory is used with the same value of E/R?

2.24
1.6
2.5
2

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Chemical Reaction Engineering
In flow reactors, the performance equations interrelate the rate of reaction to the

Extent of reaction
All of these
Reactor volume
Feed rate

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Chemical Reaction Engineering
A second order reaction of the form A + B → C is called a pseudo-first order reaction, when

CA0 > CB0
CB0 > CA0
CB0 ≥ CB0
CA0 = CB0

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Chemical Reaction Engineering
A reaction in which one of the products of reaction acts as a catalyst is called a/an __________ reaction.

Photochemical
Catalytic
Autocatalytic
None of these

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Chemical Reaction Engineering
For the liquid phase parallel reactions:R, rR = K?.CA2; E? = 80 KJ/moleS, rS = K?.CA ; E? = 120 KJ/mole The desired product is R. A higher selectivity of R will be achieved, if the reaction is conducted at

Low temperature in a CSTR
High temperature in a PFR
Low temperature in a PFR
High temperature in a CSTR

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