The dimensions of rate constant for reaction 3A ? B are (l/gm mole)/min. Therefo

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The dimensions of rate constant for reaction 3A → B are (l/gm mole)/min. Therefore the reaction order is
Options
A. 0
B. 1
C. 2
D. 3

Correct Answer

2

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Chemical Reaction Engineering problems

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1. A batch reactor is suitable for
Options
A. achieving cent percent conversion of reactants into products.
B. large scale gaseous phase reactions.
C. liquid phase reactions.
D. obtaining uniform polymerisation products in highly exothermic reactions.

3. 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
Options
A. 8987�K
B. 9210�K
C. 8764�K
D. 8621�K

4. Pick out the correct statement.
Options
A. In catalytic reactions, the catalyst reacts with the reactants.
B. A catalyst initiates a chemical reaction.
C. A catalyst lowers the activation energy of the reacting molecules.
D. A catalyst can not be recovered chemi cally unchanged at the end of the chemical reaction.

5. What is the order of a chemical reaction, , if the rate of formation of 'C', increases by a factor of 2.82 on doubling the concentration of 'A' and increases by a factor of 9 on trebling the concentration of 'B'?
Options
A. 7/2
B. 7/4
C. 5/2
D. 5/4

7. The reason why a catalyst increases the rate of reaction is that, it
Options
A. decreases the energy barrier for reaction.
B. increases the activation energy.
C. decreases the molecular collision diameter.
D. none of these.

8. For a zero order chemical reaction, the
Options
A. half life period is directly proportion to the initial concentration of the reac-tants.
B. plot of products concentration with time is a straight line through the origin.
C. products concentration increases linerarly with time.
D. all (a), (b) and (c).

9. A catalyst loses its activity due to
Options
A. loss in surface area of the active component.
B. agglomeration of metal particles caused by thermal sintering of the solid surface.
C. covering of the catalytic active sites by a foregin substance.
D. all (a), (b) and (c).

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