3/22/24, 7:02 PM -
Date :-22/03/2024
Chate Group of Education
Time :-180 Minutes
Exam Name :-Chemical Kinetics
Mark :- 50
CHEMISTRY (a) A (b) B (c) C (d) D
1. What is rate constant of a first order reaction if time 7. Calculate half life of first order reaction if rate constant of
required to decrease concentration of reactant from to reaction is [2023]
is 12 Hour?[2022]
(a) (b) (c) (d)
(a) hour (b) hour (c) hour
(d) hour 8. At 500 k, the half-life period of a gaseous reaction at an
initial pressure of 80 kPa is 350 s. when the pressure is 40
n
kPa, the half-life period is 175 s. The order of the reaction is
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2. The inversion of cane sugar into glucose and fructose is
(a) Zero (b) One (c) Two (d) Three
(a) I order (b) II order (c) III order (d) Zero order
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9. The rate of reaction at unit concentration of reactant is
3. The reaction follows zero order kinetics the
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called _____
differrntial rate equation of the reaction is
(a) Average law (b) Rate law (c) Instantaneous rate
(a)
(d)
q (b) (c)
Ed (d) Rate constant
10. For the reaction, ,
of
Calculate . [2022]
4. When the temperature of first order reaction increases then
up
according to Arrhenius equation which among the following (a) (b)
is correct?* [ MHT-CET 2020]
(c) (d)
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(a) e decreases (b) Ea/RT increase
(c) decreases 11. A first order reaction takes 40 minutes for
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completion. Calculate the half-life of reaction. [ MHT-CET
(d) decreases 2020]
(a) (b) (c) (d)
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5. The rate constant for first order reaction is
. Calculate the time required for completion of the
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12. The correct expression for the rate constant for reactions
reaction. [ MHT-CET 2020] of zero order is
(a) (b) (c) (a) (b)
(d)
(c) (d)
6. In the accompanied diagram and represent the
energy of the reactants products and activated complex
13. The branch of chemistry which with the reaction rates and
respectively which of the following is the activation energy
reaction mechanism is called
(a) Thermochemicstry (b) Photochemistry
(c) Analytical chemistry (d) Chemical kinetics
for the backward reaction?
14. Rate of reaction depends upon
(a) temperature (b) catalyst (c) concentration
(d) All of these
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2020]
15. A first order reaction takes 23.03 minutes for (a) (b) (c) (d)
decomposition. Calculate its rate constant.
(a) minute (b) minute 23. If the volume of the vessel in which the reaction
is occurring is diminished to 1/3rd of its
(c) minute (d) minute
initial volume. The rate of the reaction will be increased by
16. The rate of reaction, is (a) 3 times (b) 9 times (c) 27 times (d) 36 times
when . If the
24. When a plot of log k vesus 1/T of chemical reaction is
reaction is first order in and zeroth order in calculate rate made the energy of activation is given by the slope of straight
constant?[2022] line
(a) (a) Obtained (b) Multiplied by
(b) (c) Multiplieed by (d) Divided by
(c)
25. Order of radioactive disintegration reaction is
n
(d)
(a) Zero (b) First (c) Second (d) Third
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17. The reaction occurs by th following
at
26. The velocity constant of a reaction at 290 K was found to
mechanism (i) (ii) (iii)
be at 300 K, it will be
Rate law for this reaction is
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(a) (b) (c)
(a) (b) (c) (d)
(d)
18. For the reaction if
, then rate of reaction is ........[MHT-CET 2021]
Ed
27. Rate law equation for a reaction is rate of
of
(a) inversely proportional to square of concentration reaction doubles when ........[2022]
of . (a) conc. of is doubled and conc. of is kept
constant.
up
(b) independent of concentration of .
(c) independent of concentration of . (b) conc. of both and is doubled.
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(d) directly proportional to concentration of B. (c) conc. of is kept constant and conc. of is
halved.
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19. A first order reaction is 10% complete in 20 min. The time (d) conc. of is doubled and conc, of is halved.
taken for 19% completion is
(a) 30 min (b) 40 Min (c) 50 min (d) 38 min 28. Identify rate law expression for
at
if the reaction is second order
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20. For the elementary step in and first order in . [2023]
the molecularity is
(a) Rate (b) Rate
(a) Zero (b) 1 (c) 2 (d) Cannot ascertained (c) Rate (d) Rate
21. Which of the following is NOT true for order of reaction?
29. Diaxomium slat decomposes as
[MHT-CET 2021]
At the evolution of
(a) It is experimentally determined quantity.
becomes two times faster whne the initial concentration
(b) It is sum of powers of conc. terms in rate law of the salt is doubled therefore it is
equation.
(a) A first order reaction
(c) It may be integer, fraction or zero.
(b) Asecond oreder reaction
(d) It is theoretically quantity.
(c) Independent of the initial concentration of the
22. A first order reaction takes 40 minutes for
salt
decomposition. What is the half-life of reaction? [ MHT-CET (d) Zero order reaction
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(a) Zero (b) Natural number (c) Fraction
30. For the reaction, ,the initial
(d) Negative
concentration of was 0.20 mol and the concentration
after 20 min was 0.20 mol .Then the rate of formation of
38. What is the formula to find value of for a zero order
in mol would be
reaction?
(a) (b) (c) (d)
(a) (b) (c) (d)
31. The decomposition of occur as
and follows Ist order kinetics, hance 39. The rate constant of a reaction is per
(a) The reaction is unimolecular minute. What is half life period?[2022]
(b) The reaction is bimolecular (c) (a) 1000 second (b) 4000 second (c) 6930 second
(d) None of the above (d) 6000 second
32. According to collision theory 40. The order of reaction, with respect to one of the reacting
n
component Y, is zero. In implies that
(a) Collisions are sufficiently violent
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(a) The reaction is going on at a constant rate.
(b) All collisions are responsible for reaction
(b) The rate of reaction does not very with
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(c) All collisions are effective temperature.
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(d) Only highly energetic molecules have enough (c) The reaction rate is independent of the
enrgy to react concentration of Y.
33. Hydrolysis of a cane sugar in presence of acid a first order
reaction with half life time of 4 hours what fraction of sucrose
Ed (d) The rate of formation of the activated complex is
zero.
undergoes hydrolysis in 11 hrs.
of
41. The rate of the first order reaction X Products is
(a) 0.9345 (b) 0.6122 (c) 0.8511 (d) 0.412
when the concentration of X is 0.5
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34. If concentration of reactant ' ' is increased by 10 times, the rate constant is
the rate of reaction becomes 100 times. What is the order of (a) (b) (c)
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reaction if rate law is, rate ? [ MHT-CET 2020]
(d)
(a) 2 (b) 1 (c) 3 (d) 4
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35. Which among the following is an example of pseudo first 42. In the reaction, initial pressure is
order reaction? [ MHT-CET 2020] 500 atm and rate constant k is after 10 min
at
(a) the final pressure of is
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(a) 490 atm (b) 250 atm (c) 480 atm (d) 420 atm
(b)
43. What is the average rate of reaction when the change in
concentration of product is in 20 seconds? [ MHT-
(c) CET 2020]
(d) (a) (b) (c) (d)
44. The following mechanism has been proposed for the
reaction of NO with to form NOBr
36. The rate constant of a first order reaction is
How much time will it take to reduce the
If the second step is the
initial concentration to its 1/8th value ? rate determining step, the order of the reaction with respect to
(a) 100s (b) 200s (c) 300s (d) 400s NO(g) is
(a) 1 (b) 0 (c) 3 (d) 2
37. Molecularity of an elementary reaction can be ___
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45. What is the value of rate constant for first order reaction if
slope for the graph of rate versus concentration is 48. The burning of coal represented by the equation
? [2023] the rate of the reaction is increased by
(a) time (b) time (a) Dicrease in the concentration of oxygen
(c) time (d) time (b) Powdering the lumps of coal
(c) Decreasing the temperature
46. If the rate expresson for a chemical reactions is Rate = k
[A] [B]n then (d) Providing inert atmosphere for burning
(a) The order of ereactions is 1 49. is a first order gas reaction with
(b) The order of reactions reactons is n percentage of
(c) The order of reactions is (1+n) decomposed on heating for 90 minutes is
(d) K is independent of temearature (a) 8.87% (b) 88.7% (c) 1.13% (d) 11.3 %
47. Which of the following is NOT an example of pseudo first 50. Which of the following reaction characteristic change on
n
order reaction?[2022] addition of a catalyst to a reaction at constant temperature? (i)
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(a) Oxidation of sulfur trioxide Activation energy (ii) Equilibrium constant (iii) Reaction
entropy (iv) Reaction enthalpy
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(b) Inversion of cane sugar (a) (i) only (b) (iii) only (c) (i) and (ii) only
(c) Hydrolysis of methyl acetate
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(d) All of these
(d) Hydrolysis of ethyl acetate
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of
up
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at
Ch
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