Rate Law NEET Questions

Physical Chemistry - Chemical Kinetics

Rate Law MCQ Questions


1.
The rate of a chemical reaction is defined as:
A.
The change in concentration of reactant or product per unit time
B.
The amount of reactant consumed in the reaction
C.
The total number of molecules reacting
D.
The time taken for the reaction to complete
😑 View Answer Rough Work Error
ANSWER :
A. The change in concentration of reactant or product per unit time
2.
For the reaction 2A → B, if the rate of disappearance of A is 1×10⁻² mol L⁻¹ s⁻¹, the rate of formation of B is:
A.
2×10⁻² mol L⁻¹ s⁻¹
B.
1×10⁻² mol L⁻¹ s⁻¹
C.
5×10⁻³ mol L⁻¹ s⁻¹
D.
4×10⁻² mol L⁻¹ s⁻¹
😑 View Answer Rough Work Error
ANSWER :
C. 5×10⁻³ mol L⁻¹ s⁻¹
3.
For the reaction N₂ + 3H₂ → 2NH₃, the rate of disappearance of H₂ is related to the rate of appearance of NH₃ by:
A.
-d[H₂]/dt = (2/3) d[NH₃]/dt
B.
-d[H₂]/dt = 3 d[NH₃]/dt
C.
-d[H₂]/dt = (1/3) d[NH₃]/dt
D.
-d[H₂]/dt = (3/2) d[NH₃]/dt
😑 View Answer Rough Work Error
ANSWER :
D. -d[H₂]/dt = (3/2) d[NH₃]/dt
4.
The unit of rate constant for a zero order reaction is:
A.
L² mol⁻² s⁻¹
B.
mol L⁻¹ s⁻¹
C.
s⁻¹
D.
L mol⁻¹ s⁻¹
😑 View Answer Rough Work Error
ANSWER :
B. mol L⁻¹ s⁻¹
5.
The unit of rate constant for a first order reaction is:
A.
L mol⁻¹ s⁻¹
B.
mol L⁻¹ s⁻¹
C.
s⁻¹
D.
L² mol⁻² s⁻¹
😑 View Answer Rough Work Error
ANSWER :
C. s⁻¹
6.
The unit of rate constant for a second order reaction is:
A.
L mol⁻¹ s⁻¹
B.
L² mol⁻² s⁻¹
C.
mol L⁻¹ s⁻¹
D.
s⁻¹
😑 View Answer Rough Work Error
ANSWER :
A. L mol⁻¹ s⁻¹