With increase in temperature, the equilibrium conversion of a reversible exothermic reaction

Fractional conversion __________ for an exothermic reversible chemical reaction, when the temperature is maximum.

A

Increases

B

Remains unchanged

C

Decreases

D

Unpredictable from the data

When an exothermic reversible reaction is conducted adiabatically, the rate of reaction

A

Continuously increases

B

Continuously decreases

C

Passes through a maximum

D

Passes through a minimum

With decrease in temperature, the equilibrium conversion of a reversible endother- mic reaction

A

Decreases

B

Increases

C

Remains unaffected

D

Increases linearly with temperature

A typical example of an exothermic reversible reaction conducted at high pressure in industry is

A

Dehydration of ethanol

B

Methanol synthesis

C

Reformation of methane

D

Polymerisation of ethylene

Which of the following is the optimum operating condition for an exothermic reversible reaction taking place in a plug-flow reactor?

A

Temperature should be high in the beginning and decreased towards the end of the reaction

B

Very low temperature should be used throughout the reaction

C

Very high temperature should be used throughout the reaction

D

None of these

Two substances are in equilibrium in a reversible chemical reaction. If the concentration of each substance is doubled, then the value of the equilibrium constant will be

A

Same

B

Doubled

C

Halved

D

One fourth of its original value

In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will

A

Remain the same

B

Be halved

C

Also be doubled

D

Become one fourth

For high conversion in a highly exothermic solid catalysed reaction, use a __________ bed reactor.

A

Fixed

B

Fluidised bed reactor followed by a fixed

C

Fixed bed reactor followed by a fluidised

D

Fluidised

An exothermic reaction takes place in an adiabatic reactor. The product temperature __________ reactor feed temperature.

A

Is always equal to

B

Is always greater than

C

Is always less than

D

May be greater or less than

Temperature control of an exothermic chemical reaction taking place in a CSTR is done with the help of cooling water flowing in a jacket around the reactor. The types of valve and controller action to be recommended are

A

Air to open valve with the controller direct acting

B

Air to close valve with the controller indirect acting

C

Air to open valve with the controller indirect acting

D

Air to close valve with the controller direct acting

With increase in temperature, the equilibrium conversion of a reversible exothermic reaction

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