CHEMICAL REACTION ENGINEERING QUIZ

A Catalyst

Shortens the time to reach the equilibrium

Increases the equilibrium concentration of the product

None of these

Changes the equilibrium constant of the reaction

TRUE ANSWER : ?
YOUR ANSWER : ?

The rate constant of a chemical reaction increases by 100 times when the temperature is increased from 400 °K to 500 °K. Assuming transition state theory is valid, the value of E/R is

8764°K

8987°K

9210°K

8621°K

TRUE ANSWER : ?
YOUR ANSWER : ?

In case of physical adsorption, the heat of adsorption is of the order of __________ kcal/kg.mole.

1000

10000

100000

100

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Decreases

Remains unaffected

Decreases linearily with temperature

Increases

TRUE ANSWER : ?
YOUR ANSWER : ?

Conversion increases with increase in temperature in case of a an __________ reaction.

Reversible endothermic

Irreversible

Autocatalytic

Reversible exothermic

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A catalyst loses its activity due to

Covering of the catalytic active sites by a foregin substance

All of these

Agglomeration of metal particles caused by thermal sintering of the solid surface

Loss in surface area of the active component

TRUE ANSWER : ?
YOUR ANSWER : ?

Promoter.

All of these

Atlers the position of equilibrium in a reversible reaction

Increases the number of active centres by increasing the unevenness of catalyst surface and by creating discontinuities in the crystals

Initiates a chemical reaction and is a catalyst by itself

TRUE ANSWER : ?
YOUR ANSWER : ?

Sometimes, batch process is preferred over continuous process, when the product

Both A & B

Neither A nor B

Quality & yield can not be achieved in continuous processes, because of long residence time

Sales demand is fluctuating

TRUE ANSWER : ?
YOUR ANSWER : ?

Thermodynamic equilibrium constant in a system is affected by

Inerts

All of these

Pressure

Temperature

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YOUR ANSWER : ?

6 gm of carbon is burnt with an amount of air containing 18 gm oxygen. The product contains 16.5 gms CO₂ and 2.8 gms CO besides other constituents. What is the degree of conversion on the basis of disappearance of limiting reactant?

0.75

0.2

1

0.95

TRUE ANSWER : ?
YOUR ANSWER : ?