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CHEMICAL REACTION ENGINEERING

Chemical Reaction Engineering
A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and kg respectively. The effective rate constant (keff) is given by

1/keff = 1/k + 1/kg
keff = (k+ kg)/2
keff = (kkg)1/2
keff = k + kg

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Chemical Reaction Engineering
The half life period of a first order reaction is given by (where, K = rate constant. )

1.5 K
0.693/K
6.93 K
2.5 K

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Chemical Reaction Engineering
Catalyst is a substance, which __________ chemical reaction.

Alters the value of equilibrium constant in a reversible
Can either increase or decrease the speed of a
Decreases the speed of a
Increases the speed of a

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

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

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Chemical Reaction Engineering
Higher free energy of activation of a chemical reaction (at a given temperature) implies

Higher rate of reaction
Higher equilibrium conversion
Both B and C
Slower rate of reaction

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