Collision Theory of Bimolecular Gaseous Reactions NEET Questions

Physical Chemistry - Chemical Kinetics

Collision Theory of Bimolecular Gaseous Reactions MCQ Questions


1.
Collision theory of chemical reactions was developed by:
A.
Van't Hoff and Arrhenius
B.
Henry Eyring alone
C.
Max Trautz and William Lewis
D.
Arrhenius and Eyring
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ANSWER :
C. Max Trautz and William Lewis
2.
According to collision theory, the rate of a bimolecular gaseous reaction is given by:
A.
Rate = Z_AB × e^(-Ea/RT)
B.
Rate = Z_AB / e^(-Ea/RT)
C.
Rate = Z_AB × e^(Ea/RT)
D.
Rate = Z_AB × e^(-RT/Ea)
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ANSWER :
A. Rate = Z_AB × e^(-Ea/RT)
3.
The collision frequency (Z_AB) in collision theory refers to:
A.
The number of collisions per second per unit volume of the reaction mixture
B.
The activation energy of collisions
C.
The number of effective collisions only
D.
The total number of molecules per unit volume
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ANSWER :
A. The number of collisions per second per unit volume of the reaction mixture
4.
The factor e^(-Ea/RT) in the collision theory equation represents:
A.
The collision frequency
B.
The fraction of molecules with energy equal to or greater than activation energy
C.
The total number of collisions
D.
The probability of proper orientation
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ANSWER :
B. The fraction of molecules with energy equal to or greater than activation energy
5.
The probability factor or steric factor (P) is introduced in collision theory to account for:
A.
The temperature dependence
B.
The molecular collision frequency
C.
The energy of activation
D.
The proper orientation of colliding molecules
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ANSWER :
D. The proper orientation of colliding molecules
6.
For the reaction H2(g) + I2(g) → 2HI(g), the experimentally observed rate is much less than the rate predicted by simple collision theory. This is because:
A.
Not all collisions occur with proper orientation
B.
Hydrogen molecules are too small
C.
The reaction is exothermic
D.
The activation energy is very high
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ANSWER :
A. Not all collisions occur with proper orientation