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Chemical Reaction Engineering

Chemical Reaction Engineering
In which of the following gaseous phase reactions, the equilibrium of the reaction remains unaffacted by pressure changes ?

2NO? ? N?O?
2O? ? 3O?
N? + O? ? 2NO
2SO? + O? ? 2SO?

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Chemical Reaction Engineering
In autocatalytic reactions,

One of the products acts as a catalyst
No catalyst is used
One of the reactants acts as a catalyst
Catalysts have very high selectivity

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Chemical Reaction Engineering
The rate of the reaction, X → Y, quadruples when the concentration of 'X' is doubled. The rate expression for the reaction is, r = K Cxn, the value of 'n' in this case will be

3
2
1

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Chemical Reaction Engineering
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

0.5
1
0.33
Data insufficient, can't be predicted

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Chemical Reaction Engineering
Calcination reaction of limestone (CaCO₃ → CaO + CO₂) goes to completion in the rotary kiln, because

CaO is not dissociated
CaO is more stable than CaCO₃
CO₂ escapes continuously
Of high calcination temperature

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Chemical Reaction Engineering
The performance of a cascade of CSTR's can be improved by adding

More CSTR's in series
More CSTR's in parallel
A P.F. reactor in series
A P.F. reactor in parallel

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