Rate of reactions - Free MCQ Practice Test with solutions, JEE Chemistry
MCQ Practice Test & Solutions: Test: Rate of reactions (15 Questions)
You can prepare effectively for JEE Chemistry for JEE Main & Advanced with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Rate of reactions". These 15 questions have been designed by the experts with the latest curriculum of JEE 2026, to help you master the concept.
Test Highlights:
- - Format: Multiple Choice Questions (MCQ)
- - Duration: 20 minutes
- - Number of Questions: 15
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The reaction rate is defined as the rate at which the concentration of the reactants __________ with time or the concentration of products ___________ with time.
Detailed Solution: Question 1
Consider the following reaction
A⟶ Products
This reaction is completed in 100 min. The rate constant of this reaction at t1 = 10 min, is 10−2 min−1. What is the rate constant (in min−1) at t2 = 20 min?
A⟶ Products
This reaction is completed in 100 min. The rate constant of this reaction at t1 = 10 min, is 10−2 min−1. What is the rate constant (in min−1) at t2 = 20 min?
Detailed Solution: Question 2
also 
(constant).
Which of the following terms would not be determined experimentally?
Detailed Solution: Question 3
Consider the reaction
The equality relationship between 
and 
is
Detailed Solution: Question 4
and 
, then
A following mechanism has been proposed for reaction 2 A + B → D + E
A + B → C + D(slow)
A + C → E (fast)
The rate law expression for the reaction is:
A + B → C + D(slow)
A + C → E (fast)
The rate law expression for the reaction is:
Detailed Solution: Question 5
The rate law for the reaction 
is Rate 
The correct statement with regard to this relation is
is Rate The correct statement with regard to this relation isDetailed Solution: Question 6
is half of the rate of disappearance of 
.In a reaction, 
products, the concentration of 
decreases from 
to 
in 
. What is the rate of disappearance of A (in 
) during this interval?
products, the concentration of decreases from to in . What is the rate of disappearance of A (in ) during this interval?Detailed Solution: Question 7
.
Hence XDetailed Solution: Question 8
Detailed Solution: Question 9
The inversion of cane sugar proceeds with half-life of 500 minute at 
for any concentration of sugar. However if 
, the half-life changes to 50 minute. The rate law expression for the sugar inversion can be written as
Detailed Solution: Question 10
, the half-life is independent of the concentration of sugar. Hence, the reaction is of first order in sugar.
sugar 
.
is 
.Reaction rates are determined by all of the following factors except:
Detailed Solution: Question 11
For a reaction 
, rate of disappearance of ' 
is related to the rate of appearance of 'B' by the expression
Detailed Solution: Question 12
or 
The terms rate of reaction and rate of appearance (or disappearance) of reactant (or product)
Detailed Solution: Question 13
For the reaction 
in alkaline aqueous solution, the value of the second order (in 
) rate constant at 
in the rate law 
was found to be
. Rate constant when the rate law is written for 
is
in alkaline aqueous solution, the value of the second order (in ) rate constant at in the rate law was found to be. Rate constant when the rate law is written for isDetailed Solution: Question 14
A G.M. counter is used to study the radioactive process of first-order. In the absence of radioactive substance 
, it counts 3 disintegration per second (dps). When 
is placed in the G.M. counter, it records 23 dps at the start and 13 dps after 10 minutes. It records 
dps after next 10 minutes and 
has half-life period y minutes. 
and 
are
, it counts 3 disintegration per second (dps). When is placed in the G.M. counter, it records 23 dps at the start and 13 dps after 10 minutes. It records dps after next 10 minutes and has half-life period y minutes. and areDetailed Solution: Question 15
minutes
dps
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