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Test: Rate law and rate constant - JEE MCQ
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15 Questions MCQ Test Chemistry for JEE Main & Advanced - Test: Rate law and rate constant
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Detailed Solution for Test: Rate law and rate constant - Question 1
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Test: Rate law and rate constant - Question 2
In a certain polluted atmosphere containing O3 at a steady concentration of 2.0 x 10-6 M, the hourly production of O3 by all sources was estimated as 7.2 x 10-15 M. If the only mechanism for destruction of O3 in the second-order reaction is
2O3 → 3O2
then rate constant for destruction reaction, defined by the rate law for - Δ[O3]/Δf is x * 10-7 M-1 s-1 . What is the value of x?
Detailed Solution for Test: Rate law and rate constant - Question 2
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Test: Rate law and rate constant - Question 3
Only One Option Correct Type
This section contains 2 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct
For a reversible reaction, net rate is
hence given reaction is
Detailed Solution for Test: Rate law and rate constant - Question 3
Detailed Solution for Test: Rate law and rate constant - Question 4
Test: Rate law and rate constant - Question 5
The rate constants for a reaction at 
and 
are 
and 
,respectively. The activation energy of the reaction in 
is ______
and are and ,respectively. The activation energy of the reaction in is ______
Detailed Solution for Test: Rate law and rate constant - Question 5
and 
are 
and 
,respectively. The activation energy of the reaction in 
is ______
It means
Detailed Solution for Test: Rate law and rate constant - Question 6
Test: Rate law and rate constant - Question 7
The time required for 
completion of a first order reaction at 
is equal to that required for its 
completion at 
. If the preexponential factor for the reaction is 
, the activation energy at 
is:
completion of a first order reaction at is equal to that required for its completion at . If the preexponential factor for the reaction is , the activation energy at is:
Detailed Solution for Test: Rate law and rate constant - Question 7
...(i)
...(ii)
Test: Rate law and rate constant - Question 8
In a reaction A → Products, when start is made from 8.0 × 10−2 M of A, half-life is found to be 120 minute. For the initial concentration 4.0 × 10−2 M, the half-life of the reaction becomes 240 minute. The order of the reaction is:
Detailed Solution for Test: Rate law and rate constant - Question 8
Test: Rate law and rate constant - Question 9
For the reaction A + B⟶ products, it is observed that:
(1) On doubling the initial concentration of A only, the rate of reaction is also doubled and
(2) On doubling the initial concentrations of both A and B, there is a change by a factor of 8 in the rate of the reaction. The rate of this reaction is given by:
Detailed Solution for Test: Rate law and rate constant - Question 9
Test: Rate law and rate constant - Question 10
The order of a reaction, with respect to one of the reacting component 
, is zero. It implies that:
, is zero. It implies that:
Detailed Solution for Test: Rate law and rate constant - Question 10
is zero. 
.
Test: Rate law and rate constant - Question 11
The rate law for the reaction below is given by the expression k[A][B]
A + B → Product
If the concentration of B is increased from 0.1 to 0.3 mole, keeping the value of A at 0.1 mole, the rate constant will be:
Detailed Solution for Test: Rate law and rate constant - Question 11
Test: Rate law and rate constant - Question 12
The half-life of a reaction is inversely proportional to the square of the initial concentration of the reactant. Then the order of the reaction is
Detailed Solution for Test: Rate law and rate constant - Question 12
Thus reaction is of 
order
Test: Rate law and rate constant - Question 13
Consider the two hypothetical reactions given below:
I
Products, 
II
Products, 
The half-lives of both the reactions are the same, equal to
when molar concentration of the reactant is 
in each case. If these reactions are started at the same time taking 
of the reactant in each case, the ratio 
after 
will be :
I
Products, II
Products, The half-lives of both the reactions are the same, equal to
when molar concentration of the reactant is in each case. If these reactions are started at the same time taking of the reactant in each case, the ratio after will be :
Detailed Solution for Test: Rate law and rate constant - Question 13
indicate that reaction 
is of second order and reaction 
is first order. For 
reaction, 
, first 
, second 
Test: Rate law and rate constant - Question 14
The rate of a reaction increases four-fold when the concentration of reactant is increased 16 times. If the rate of reaction is 
when the concentration of the reactant is 
The rate constant of the reaction will be
when the concentration of the reactant is The rate constant of the reaction will be
Detailed Solution for Test: Rate law and rate constant - Question 14
Test: Rate law and rate constant - Question 15
A chemical reaction was carried out at 
and 
. The rate constants were found to be 
and 
respectively. then
and . The rate constants were found to be and respectively. then
Detailed Solution for Test: Rate law and rate constant - Question 15
rise in temperature. For 
rise, the rate constant will be 4 times 
or 
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