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


1.
The differential rate equation for a zero order reaction A → P is:
A.
-d[A]/dt = k/[A]
B.
-d[A]/dt = k[A]²
C.
-d[A]/dt = k[A]
D.
-d[A]/dt = k
😑 View Answer Rough Work Error
ANSWER :
D. -d[A]/dt = k
2.
The integrated rate law for a zero order reaction is:
A.
[A] = [A]₀ - kt
B.
ln[A] = ln[A]₀ - kt
C.
[A] = [A]₀ + kt
D.
1/[A] = 1/[A]₀ + kt
😑 View Answer Rough Work Error
ANSWER :
A. [A] = [A]₀ - kt
3.
The rate constant k for a zero order reaction in terms of [A]₀, [A] and t is:
A.
k = ([A] - [A]₀)/t
B.
k = (1/t)(1/[A] - 1/[A]₀)
C.
k = ([A]₀ - [A])/t
D.
k = (2.303/t) log([A]₀/[A])
😑 View Answer Rough Work Error
ANSWER :
C. k = ([A]₀ - [A])/t
4.
The unit of rate constant for a zero order reaction is:
A.
L mol⁻¹ s⁻¹
B.
s⁻¹
C.
L² mol⁻² s⁻¹
D.
mol L⁻¹ s⁻¹
😑 View Answer Rough Work Error
ANSWER :
D. mol L⁻¹ s⁻¹
5.
For a zero order reaction, the rate of reaction:
A.
Is independent of the concentration of reactant
B.
Is directly proportional to concentration
C.
Is proportional to square of concentration
D.
Is inversely proportional to concentration
😑 View Answer Rough Work Error
ANSWER :
A. Is independent of the concentration of reactant
6.
In a zero order reaction, the plot of concentration of reactant [A] versus time t gives:
A.
An exponential decay curve
B.
A straight line with negative slope
C.
A hyperbolic curve
D.
A straight line with positive slope
😑 View Answer Rough Work Error
ANSWER :
B. A straight line with negative slope