For the irreversible elementary reactions in parallel viz , the rate of disappea

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Question
For the irreversible elementary reactions in parallel viz , the rate of disappearance of 'X' is equal to
Options
A. C_A(K₁+K₂)
B. C_A(K₁ + K₂)/2
C. C_A . K₁/2
D. C_A . K₂/2

Correct Answer

C_A(K₁+K₂)

Chemical Reaction Engineering problems

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1. A catalyst
Options
A. initiates a reaction.
B. lowers the activation energy of reacting molecules.
C. is capable of reacting with any one of the reactants.
D. can not be recovered chemically unchanged at the end of a chemical reaction.

2. Fractional conversion __________ with increase in pressure for ammonia synthesis reaction i.e., N₂ + 3H₂ ⇌ 2NH₃.
Options
A. increases
B. decreases
C. remains unchanged
D. unpredictable from the data

4. A reactor is generally termed as an autoclave, when it is a
Options
A. high pressure batch reactor.
B. atmospheric pressure tank reactor.
C. high pressure tubular reactor.
D. atmospheric pressure CSTR.

6. A first order irreversible reaction, A → B is carried out separately in a constant volume as well as in a variable volume reactor for a particular period. It signifies that __________ in the two reactors.
Options
A. both conversion as well as concentration are same
B. conversion in both will be the same but concentrations will be different
C. both the conversion as well as concentrations will be different
D. none of these.

8. For every 10�C rise in temperature, the rate of chemical reaction doubles. When the temperature is increased from 30 to 70�C, the rate of reaction increases __________ times.
Options
A. 8
B. 12
C. 16
D. 32

9. The increase in the rate of reaction with temperature is due to
Options
A. increase in the number of effective collisions.
B. decrease in activation energy.
C. increase in the average kinetic energy of the reacting molecules.
D. none of these.

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