Differential and Integral Forms of Zero and First-Order Reactions and their Characteristics and Half-Lives NEET Questions

Physical Chemistry - Chemical Kinetics

Differential and Integral Forms of Zero and First-Order Reactions and their Characteristics and Half-Lives MCQ Questions


13.
For a first-order reaction, time to reduce [A]₀ to [A] is given by
A.
t = (2.303/k) log([A]₀/[A])
B.
t = [A]₀/[A]
C.
t = kt
D.
t = 1/[A]
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ANSWER :
A. t = (2.303/k) log([A]₀/[A])
14.
Which of the following plots gives a straight line for a first-order reaction?
A.
log [A] vs t
B.
[A] vs t
C.
1/[A] vs t
D.
[A]² vs t
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ANSWER :
A. log [A] vs t
15.
The half-life of a reaction increases with decrease in initial concentration. The order of reaction is:

NEET - 2024

A.
Zero
B.
First
C.
Second
D.
Third
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ANSWER :
C. Second
16.
Which reaction shows constant rate regardless of concentration?
A.
Zero-order
B.
First-order
C.
Second-order
D.
Pseudo-first-order
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ANSWER :
A. Zero-order
17.
Graph of [A] vs time is linear for
A.
Zero-order
B.
First-order
C.
Second-order
D.
All of these
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ANSWER :
A. Zero-order
18.
In a zero-order reaction, if initial concentration is doubled, the half-life:

NEET - 2021

A.
Doubles
B.
Becomes half
C.
Remains same
D.
Becomes four times
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ANSWER :
A. Doubles