Arrhenius Equation NEET Questions

Physical Chemistry - Chemical Kinetics

Arrhenius Equation MCQ Questions


1.
The Arrhenius equation expresses the temperature dependence of the rate constant as:
A.
k = A·e^(-Eₐ/RT)
B.
k = A·e^(-RT/Eₐ)
C.
k = A·e^(+Eₐ/RT)
D.
k = (Eₐ/RT)·e^A
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ANSWER :
A. k = A·e^(-Eₐ/RT)
2.
In the Arrhenius equation k = A·e^(-Eₐ/RT), the term 'A' is called the:
A.
Rate constant at zero temperature
B.
Activation energy
C.
Order of the reaction
D.
Frequency factor (or pre-exponential factor)
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ANSWER :
D. Frequency factor (or pre-exponential factor)
3.
In the Arrhenius equation, R is:
A.
The rate constant ratio
B.
The Rydberg constant
C.
The reaction quotient
D.
The universal gas constant (8.314 J mol⁻¹ K⁻¹)
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ANSWER :
D. The universal gas constant (8.314 J mol⁻¹ K⁻¹)
4.
The temperature T in the Arrhenius equation must be expressed in:
A.
Degrees Celsius
B.
Any consistent unit
C.
Kelvin (absolute temperature)
D.
Degrees Fahrenheit
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ANSWER :
C. Kelvin (absolute temperature)
5.
The Arrhenius equation was originally proposed by Svante Arrhenius in:
A.
1889
B.
1989
C.
1789
D.
1809
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ANSWER :
A. 1889
6.
The factor e^(-Eₐ/RT) in the Arrhenius equation represents:
A.
The fraction of effective collisions per second
B.
The activation energy at temperature T
C.
The total number of collisions per unit time
D.
The fraction of molecules with energy ≥ Eₐ at temperature T
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ANSWER :
D. The fraction of molecules with energy ≥ Eₐ at temperature T