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


7.
The unit of k for a first-order reaction is
A.
L mol⁻¹ s⁻¹
B.
L² mol⁻² s⁻¹
C.
s⁻¹
D.
mol L⁻¹ s⁻¹
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ANSWER :
C. s⁻¹
8.
For a first-order reaction, the half-life is:

NEET - 2016

A.
Independent of concentration
B.
Directly proportional to concentration
C.
Inversely proportional to concentration
D.
Proportional to the square of concentration
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ANSWER :
A. Independent of concentration
9.
The time required for a first-order reaction to complete 75% of the reaction is
A.
2t₁/₂
B.
t₁/₂
C.
t₁/₂/2
D.
t₁/₂ × ln(2)
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ANSWER :
A. 2t₁/₂
10.
In which order reaction is the rate independent of concentration?
A.
First order
B.
Second order
C.
Third order
D.
Zero order
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ANSWER :
D. Zero order
11.
Which of the following graphs represents a zero-order reaction?
A.
[A] vs t is linear and decreasing
B.
ln[A] vs t is linear and decreasing
C.
1/[A] vs t is linear and increasing
D.
[A] vs t is curved
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ANSWER :
A. [A] vs t is linear and decreasing
12.
Which expression represents half-life for a zero-order reaction?
A.
t₁/₂ = [A]₀/2k
B.
t₁/₂ = 0.693/k
C.
t₁/₂ = k[A]₀
D.
t₁/₂ = [A]₀k
😑 View Answer Rough Work Error
ANSWER :
A. t₁/₂ = [A]₀/2k