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Chemical Reaction Engineering

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

4
2
1
3

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Chemical Reaction Engineering
An isothermal irreversible reaction is being carried out in an ideal tubular flow reactor. The conversion in this case will __________ with decrease in space time.

Increase exponentially
Remain unchanged
Decrease
Increase

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

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Chemical Reaction Engineering
When all the limiting reactant is consumed in the reaction, the operational yield __________ the relative yield.

Is greater than
Equals
Can be either greater or smaller than (depends on the type of reaction)
Is smaller than

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Chemical Reaction Engineering
A catalyst is said to be a negative catalyst, ifit

Reduces the value of equilibrium constant
Retards the rate of reaction
Does not initiate the reaction
All of these

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Chemical Reaction Engineering
In an exothermic chemical reaction, the reactants compared to the products have

Higher temperature
More energy
Less energy
Same energy

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