CHEMICAL REACTION ENGINEERING QUIZ

The conversion in a mixed reactor/accomplishing a reaction A 3R is 50% when gaseous reactant 'A' is introduced at the rate of 1 litre/second and the leaving flow rate is 2 litres/second. The holding time for this operation is __________ second.

2

3

1

0.5

TRUE ANSWER : ?
YOUR ANSWER : ?

Consider the 'n' th order irreversible liquid phase reaction A → B. Which one of the following plots involving half life of the reaction (t1/2) and the initial reactant concentration (CA0) gives a straight line plot?

CA0 Vs t1/2

CA0 Vs ln t1/2

Ln CA0 Vs ln t1/2

Ln CA0 Vs t1/2

TRUE ANSWER : ?
YOUR ANSWER : ?

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

There may be diffusion along the flow path

There is no lateral mixing of fluid

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

The composition of reactants remains constant along a flow path

TRUE ANSWER : ?
YOUR ANSWER : ?

A catalyst promoter

Itself has very high activity

All of these

Improves the activity of a catalyst

Acts as a catalyst support

TRUE ANSWER : ?
YOUR ANSWER : ?

Reactions with high activation energy are

Always irreversible

Very temperature sensitive

Always reversible

Temperature insensitive

TRUE ANSWER : ?
YOUR ANSWER : ?

The synthesis of proteins and metabolism in biological objects occur in the presence of biocatalyst called

A ferment or an enzyme

None of these

Fungi

Haemoglobin

TRUE ANSWER : ?
YOUR ANSWER : ?

A reversible liquid phase endothermic reaction is to be carried out in a plug flow reactor. For minimum reactor volume, it should be operated such that the temperature along the length

Increases

Decreases

First increases and then decreases

Is at the highest allowable temperature throughout

TRUE ANSWER : ?
YOUR ANSWER : ?

The catalyst in a first order chemical reaction changes the

Activation energy

Equilibrium constant

Heat of formation of the product

Heat of reaction

TRUE ANSWER : ?
YOUR ANSWER : ?

For a tubular flow reactor with uniform concentration and temperature, the independent variable is

Diameter

None of these

Length

Time

TRUE ANSWER : ?
YOUR ANSWER : ?

Rate of a chemical reaction is independent of the concentration of the reactants for a __________ reaction.

Consecutive

Third order

None of these

Zero order

TRUE ANSWER : ?
YOUR ANSWER : ?

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