Collision Theory of Bimolecular Gaseous Reactions NEET Questions

Physical Chemistry - Chemical Kinetics

Collision Theory of Bimolecular Gaseous Reactions MCQ Questions


13.
For a bimolecular gaseous reaction A + B → Products, if the concentrations of A and B are doubled, the collision frequency will:
A.
Increase four times
B.
Double
C.
Increase eight times
D.
Remain the same
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ANSWER :
A. Increase four times
14.
The threshold energy of a reaction is:
A.
The average kinetic energy
B.
The energy of products
C.
The minimum energy that colliding molecules must possess for effective collision
D.
The maximum energy of reactant molecules
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ANSWER :
C. The minimum energy that colliding molecules must possess for effective collision
15.
If the activation energy of a reaction is zero, then the rate constant according to collision theory:
A.
Equals the collision frequency Z_AB
B.
Becomes zero
C.
Equals the steric factor P
D.
Becomes infinity
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ANSWER :
A. Equals the collision frequency Z_AB
16.
Which of the following statements about steric factor (P) is correct?
A.
P is generally less than 1
B.
P is always equal to 1
C.
P depends only on temperature
D.
P is always greater than 1
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ANSWER :
A. P is generally less than 1
17.
Collision theory is most successful in explaining the kinetics of:
A.
Reactions in solutions
B.
Heterogeneous reactions
C.
Bimolecular gaseous reactions involving simple molecules
D.
All types of reactions including complex organic reactions
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ANSWER :
C. Bimolecular gaseous reactions involving simple molecules
18.
The major limitation of simple collision theory is that it:
A.
Does not include activation energy
B.
Treats molecules as hard spheres and ignores their structure
C.
Predicts very low rates
D.
Cannot explain temperature dependence
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ANSWER :
B. Treats molecules as hard spheres and ignores their structure