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.
In a zero order reaction, the slope of the plot of [A] vs t is equal to:
A.
-k/2.303
B.
+k
C.
+2.303k
D.
-k
😑 View Answer Rough Work Error
ANSWER :
D. -k
8.
For a zero order reaction, the rate of consumption of reactant:
A.
First decreases then increases
B.
Decreases with time
C.
Increases with time
D.
Remains constant throughout the reaction
😑 View Answer Rough Work Error
ANSWER :
D. Remains constant throughout the reaction
9.
The half-life expression for a zero order reaction is:
A.
t₁/₂ = 0.693/k
B.
t₁/₂ = [A]₀/(2k)
C.
t₁/₂ = 1/(k[A]₀)
D.
t₁/₂ = 2[A]₀/k
😑 View Answer Rough Work Error
ANSWER :
B. t₁/₂ = [A]₀/(2k)
10.
In a zero order reaction, the half-life is:
A.
Directly proportional to initial concentration
B.
Independent of initial concentration
C.
Proportional to square of initial concentration
D.
Inversely proportional to initial concentration
😑 View Answer Rough Work Error
ANSWER :
A. Directly proportional to initial concentration
11.
If the initial concentration of a zero order reaction is doubled, its half-life:
A.
Is halved
B.
Is doubled
C.
Remains the same
D.
Becomes one-fourth
😑 View Answer Rough Work Error
ANSWER :
B. Is doubled
12.
Examples of zero order reactions include:
A.
Decomposition of HI on the surface of gold (Au)
B.
Hydrolysis of methyl acetate
C.
Radioactive decay of ²³⁸U
D.
Decomposition of N₂O₅
😑 View Answer Rough Work Error
ANSWER :
A. Decomposition of HI on the surface of gold (Au)