CHEMICAL REACTION ENGINEERING QUIZ

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

Both B and C

Higher rate of reaction

Higher equilibrium conversion

Slower rate of reaction

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For a fluidised bed reactor, the most suitable/relevant model is a __________ model.

Plug flow

Bubbling bed

Tank in series

None of these

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Equilibrium of a chemical reaction as viewed by kinetics is a __________ state.

None of these

Dynamic unsteady

Static steady

Dynamic steady

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Kinetics of a catalytic reaction can be best studied on a/an __________ reactor.

Mixed

Differential (flow)

Integral (plug flow)

Either A, B and C

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The ratio of volume of mixed reactor to the volume of P.F.R. (for identical flow rate, feed composition and conversion) for zero order reaction is

1

> 1

∞

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In an ideal P.F.R. at steady state conditions

The composition of reactants remains constant along a flow path

There is no lateral mixing of fluid

There may be diffusion along the flow path

The conversion of the reactant varies from point to point along a flow path

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What is the order of a chemical reaction in which doubling the initial concentration of the reactants doubles the half life time of the reaction?

1

Zero

2

3

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The increase in the rate of reaction with temperature is due to

Increase in the number of effective collisions

Decrease in activation energy

Increase in the average kinetic energy of the reacting molecules

None of these

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An example of autothermal reactor operation is

Ethylene oxidation

Sulphur dioxide oxidation

Benzene oxidation

Ammonia synthesis

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Most important characteristics of gas-liquid reactors are the

Both A and B

Specific inter-facial area

Liquid hold-up

None of these

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