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Chemical Reaction Engineering

Chemical Reaction Engineering
Molecularity of an elementary reaction, P + Q → R + S is

4
1
2
3

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Chemical Reaction Engineering
If in the gaseous phase reaction, N₂O₄ ⇋ 2NO₂, x is the part of N₂O₄ which dissociates, then the number of molecules at equilibrium will be

(1 + x)
(1 - x)²
(1 - x)
(1 + x)²

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Chemical Reaction Engineering
If helium is introduced in a reactor containing O₂, SO₂ and SO₃ at equilibrium, so that total pressure increases while volume and temperature remains constant. In this case the dissociation of SO₃ (as per Le Chatlier principle)

Decreases
Increases
Remains unaltered
Changes unpredictably

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Chemical Reaction Engineering
Enzymes are destroyed, when the

Reactant's concentration is very low
Reaction rate is independent of the reactant's concentration
Temperature is very high
Reactant's concentration is very high

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Chemical Reaction Engineering
Holding time for flow reactors is __________ the space time, for constant fluid density

Triple
Equal to
None of these
Double

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Chemical Reaction Engineering
Half-life period for a first order reaction is __________ the initial concentration of the reactant.

Inversely proportional to
Independent of
None of these
Directly proportional to

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