Rate Constant and its Units NEET Questions

Physical Chemistry - Chemical Kinetics

Rate Constant and its Units MCQ Questions


7.
What is the unit of rate constant for a reaction of order n?
A.
L^(n−1) mol^(1−n) s⁻¹
B.
L mol⁻¹ s⁻¹
C.
mol L⁻¹ s⁻¹
D.
L mol⁻² s⁻¹
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ANSWER :
A. L^(n−1) mol^(1−n) s⁻¹
8.
Rate constant has unit of s⁻¹ in
A.
zero-order reaction
B.
second-order reaction
C.
third-order reaction
D.
first-order reaction
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ANSWER :
D. first-order reaction
9.
Which reaction has rate constant with unit L² mol⁻² s⁻¹?
A.
First-order
B.
Second-order
C.
Third-order
D.
Zero-order
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ANSWER :
C. Third-order
10.
If rate = k[A], and rate is in mol L⁻¹ s⁻¹, unit of k is
A.
L mol⁻¹ s⁻¹
B.
s⁻¹
C.
L² mol⁻² s⁻¹
D.
mol L⁻¹ s⁻¹
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ANSWER :
B. s⁻¹
11.
In a zero-order reaction, k has same unit as
A.
[A]
B.
Rate
C.
Time
D.
ln[A]
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ANSWER :
A. [A]
12.
Which one of the following has same units for rate and rate constant?
A.
Zero order
B.
First order
C.
Second order
D.
Third order
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ANSWER :
A. Zero order