Test: Collision Theory, Energy of Activation - JEE MCQ
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20 Questions MCQ Test - Test: Collision Theory, Energy of Activation
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Test: Collision Theory, Energy of Activation - Question 1
A first order reaction is half-completed in 45 minutes. How long does it need for 
of the reaction to be completed?
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 1
further
hours.
Test: Collision Theory, Energy of Activation - Question 2
At a certain temperature, the first order rate constant k1 is found to be smaller than the second order rate constant k2. If the energy of activation E1 of the first order reaction is greater than energy of activation E2 of the second order reaction, then with increase in temperature.
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 2
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Test: Collision Theory, Energy of Activation - Question 3
A reaction which is of first order w.r.t. reactant 
, has a rate constant 
. If we start with 
, when would [A] reach the value of 
, has a rate constant . If we start with , when would [A] reach the value of
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 3
Test: Collision Theory, Energy of Activation - Question 4
The rate of a first order reaction is 
at 
concentration of the reactant. The halflife of the reaction is
at concentration of the reactant. The halflife of the reaction is
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 4
Products
or 
Test: Collision Theory, Energy of Activation - Question 5
For a first order reaction 
the reaction rate at reactant concentration of 
is found to be 
. The half life period of the reaction is
the reaction rate at reactant concentration of is found to be . The half life period of the reaction is
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 5
Test: Collision Theory, Energy of Activation - Question 6
A reaction proceeds by first order, 
of this reaction was completed in 32 min. The time required for 
completion is
of this reaction was completed in 32 min. The time required for completion is
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 6
reaction gets completed in 32 
to get the value of time required for 
completion of reaction
Test: Collision Theory, Energy of Activation - Question 7
In the reaction 
, rate constant is 
. If we start with 
of A then conc. of 
and B after 10 minuter are respectively.
, rate constant is . If we start with of A then conc. of and B after 10 minuter are respectively.
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 7
Test: Collision Theory, Energy of Activation - Question 8
The half life for the virus inactivation if in the beginning 
of the virus is inactivated per minute is (Given: The reaction is of first order)
of the virus is inactivated per minute is (Given: The reaction is of first order)
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 8
Test: Collision Theory, Energy of Activation - Question 9
At 
, if the rate constant of a first order reaction is 
, the time to reduce the initial concentration of the reactant to 
in seconds is :
, if the rate constant of a first order reaction is , the time to reduce the initial concentration of the reactant to in seconds is :
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 9
th, we use the formula:
, we have:
, we get approximately 500 seconds.
Test: Collision Theory, Energy of Activation - Question 10
The rate constant of a reaction with a virus is 
. Time required for the virus to become 
inactivated is
. Time required for the virus to become inactivated is
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 10
Test: Collision Theory, Energy of Activation - Question 11
A Geigger Muller counter is used to study the radioactive process. In the absence of radioactive substance 
, it counts 3 disintegration per second (dps). At the start in the presence of 
, it records 23 dps; and after 10 min 13 dps,
(i) What does it count after
(ii) What is the halflife of A?
, it counts 3 disintegration per second (dps). At the start in the presence of , it records 23 dps; and after 10 min 13 dps,(i) What does it count after
(ii) What is the halflife of A?
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 11
dps is zero error, hence 
recorded 
Test: Collision Theory, Energy of Activation - Question 12
The rate equation for a reaction,
is Rate
. If the initial concentration of the reactant is 
mol 
, the half-life period of the reaction is
is Rate
. If the initial concentration of the reactant is mol , the half-life period of the reaction is
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 12
Test: Collision Theory, Energy of Activation - Question 13
Half-lives of first-order and zeroth order reactions are same. Ratio of rates at the start of nreaction is
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 13
zeroth 
first 
Test: Collision Theory, Energy of Activation - Question 14
The plot of concentration of the reactant Vs time for a reaction is a straight line with a negative slope. The reaction follows a rate equation of
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 14
Test: Collision Theory, Energy of Activation - Question 15
The reaction 
is started with 
of L. After 30 and 90 minutes 
and 
of 
respectively are left. The order of the reaction is
is started with of L. After 30 and 90 minutes and of respectively are left. The order of the reaction is
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 15
therefore 
is 30 minutes. In 90 minutes the amount is reduced to 
i.e. 
Here 
True for 1st order reaction.
Test: Collision Theory, Energy of Activation - Question 16
The plot that represents the zero order reaction is:
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 16
Test: Collision Theory, Energy of Activation - Question 17
For a first order reaction, a plot of log(a−x) against time is a straight line with a negative slope equal to
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 17
Test: Collision Theory, Energy of Activation - Question 18
In the presence of an acid, the initial concentration of cane sugar was reduced from 
to 
in 5 hours and from 
to 
in 10 hours. The reaction is of :
to in 5 hours and from to in 10 hours. The reaction is of :
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 18
Test: Collision Theory, Energy of Activation - Question 19
For the decomposition of 
at 
, the following data were obtained
The order of reaction is :
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 19
Test: Collision Theory, Energy of Activation - Question 20
The hypothetical reaction 
follows the following mechanism 
, 
The order of the overall reaction is
Detailed Solution for Test: Collision Theory, Energy of Activation - Question 20
;
(Fast);
(Slow)
put value of 
from Ist reaction since 
is intermediate
Rate law equation 
Order 
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