JEE Main Chemistry Chemical Kinetics Online Test
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JEE Main Chemistry Chemical Kinetics Online Test. JEE Main Online Test for Chemistry Chemical Kinetics. JEE Main Full Online Quiz for Chemistry Chemical Kinetics. JEE Main Free Mock Test Paper 2019. JEE Main 2019 Free Online Practice Test, Take JEE Online Test for All Subjects. JEE Main Question and Answers for Chemistry Chemical Kinetics. In this test You may find JEE Main all subjects Questions with Answers. Check JEE Main Question and Answers in English. This mock Test is free for All Students. Mock Test Papers are very helpful for Exam Purpose, by using below Mock Test Paper you may Test your Study for Next Upcoming Exams. Now Scroll down below n Take JEE Main Chemistry Chemical Kinetics…
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Question 1 of 30
1. Question
A rapid reaction is distinguished by
Correct
Incorrect
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Question 2 of 30
2. Question
In the following graphical representation for the reaction A → B there are two types of regions
Correct
Incorrect
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Question 3 of 30
3. Question
The reaction of ozone with oxygen atom in the presence of chlorine atom can occur by the two – step process shown here with the rate constant for each step
O3(g) + Cl(g) → O2(g) + ClO(g), K1 = 5.2 × 109 L mol–1 s–1
ClO(g) + O(g) → O2(g) + Cl(g), K2 = 2.6 × 1010 L mol–1 s–1
Which of the values below is the closest to the rate constant of the overall net reaction, given by the equation
O3(g) + O(g) → 2O2(g)?
Correct
Incorrect
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Question 4 of 30
4. Question
The inversion of cane sugar into glucose and fructose according to the equation
C12H22O11 + H2O → C6H12O6 + C6H12O6
Is an example of
Correct
Incorrect
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Question 5 of 30
5. Question
A reaction follows the given concentration–time graph. The rate for this reaction at 20 s will be
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Incorrect
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Question 6 of 30
6. Question
The rate law for the reaction
RCl + NaOH → ROH + NaCl is given by Rate = k [RCl]. The rate of this reaction
Correct
RCI + NaOH → ROH + NaCI
Rate = k[RCl]
For this reaction, rate of reaction depends upon the concentration of RCl.
It means, the rate of reaction is halved by reducing the concentration of RCl by one half.
Incorrect
RCI + NaOH → ROH + NaCI
Rate = k[RCl]
For this reaction, rate of reaction depends upon the concentration of RCl.
It means, the rate of reaction is halved by reducing the concentration of RCl by one half.
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Question 7 of 30
7. Question
The rate of the reaction, A + B2 → AB + B is directly proportional to the concentration of A and independent of concentration of B2, hence, rate law is
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Incorrect
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Question 8 of 30
8. Question
For a gaseous reaction, the units of rate of reaction are
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Incorrect
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Question 9 of 30
9. Question
For zeroth order reaction
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Incorrect
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Question 10 of 30
10. Question
For the decomposition of N2O5 at a particular temperature, according to the equations
2N2O5 → 4NO2 + O2
N2O5 → 2NO2 + 1/2 O2
The activation energies are E1 and E2 respectively then
Correct
Activation energy of a reaction is constant at constant temperature hence, E1 = E2.
Incorrect
Activation energy of a reaction is constant at constant temperature hence, E1 = E2.
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Question 11 of 30
11. Question
Which represents first order reaction out of I, II and III?
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Incorrect
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Question 12 of 30
12. Question
Units of rate constant of first and zero order reactions in terms of molarity M unit are respectively
Correct
For nth order reaction
K = (mol L–1)1–n s–1
For first order reaction
Unit of k = s–1
For zero order reaction
Unit of k = mol L–1 s–1 = M s–1
Incorrect
For nth order reaction
K = (mol L–1)1–n s–1
For first order reaction
Unit of k = s–1
For zero order reaction
Unit of k = mol L–1 s–1 = M s–1
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Question 13 of 30
13. Question
For the above reaction, if concentration of A is changed from 0.1 M to 0.2 M, rate becomes
Correct
Incorrect
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Question 14 of 30
14. Question
For a second order reaction, 2A → Product, a straight line is obtained if we plot
Correct
Incorrect
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Question 15 of 30
15. Question
The rate of a chemical reaction doubles for every 10°C rise in temperature. If the temperature is increased by 60°C, the rate of reaction increases by
Correct
If the temperature is increased by 60°C then 10° increase has been made 6 times and therefore, rate will increase by 26 = 64 time.
Incorrect
If the temperature is increased by 60°C then 10° increase has been made 6 times and therefore, rate will increase by 26 = 64 time.
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Question 16 of 30
16. Question
If in the fermentation of sugar in an enzymatic solution that is initially 0.12 M the concentration of the sugar is reduced to 0.06 M in 10 h and to 0.03 M in 20 h, then order of the reaction is
Correct
0.12 M → 0.06 M 10h (50% reaction)
0.12 M → 0.03 M 20 h (75% reaction)
Time of 75% reaction = 2 × time of 50% reaction
Which is property of first order reaction
Incorrect
0.12 M → 0.06 M 10h (50% reaction)
0.12 M → 0.03 M 20 h (75% reaction)
Time of 75% reaction = 2 × time of 50% reaction
Which is property of first order reaction
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Question 17 of 30
17. Question
If a certain reaction is first order with respect to A, second order with respect to B and zero order with respect to C then what is the order of reaction?
Correct
Rate law dx/dt = k[A]1[B]2[C]0 = k[A]1[B]2
Hence, order of reaction = 1 + 2 = 3
Incorrect
Rate law dx/dt = k[A]1[B]2[C]0 = k[A]1[B]2
Hence, order of reaction = 1 + 2 = 3
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Question 18 of 30
18. Question
For a reaction A + B → C + D, if the concentration of A is doubled without altering the concentration of B, the rate gets doubled. If the concentration of B is increased by nine times without altering the concentration of A, the rate gets tripled. The order of the reaction is
Correct
For reaction, A + B → C + D
r1 = k [A]a[B]b … (i)
r2 = 2r1 = k[2A]a[B]b … (ii)
and r3 = 3r1 = k[A]a [9B]b … (iii)
from (i) and (ii) a = 1
form (i) and (iii), b = 1/2
∴ Order = a + b
= 1 + 1/2 × 3/2 = 1.5
Incorrect
For reaction, A + B → C + D
r1 = k [A]a[B]b … (i)
r2 = 2r1 = k[2A]a[B]b … (ii)
and r3 = 3r1 = k[A]a [9B]b … (iii)
from (i) and (ii) a = 1
form (i) and (iii), b = 1/2
∴ Order = a + b
= 1 + 1/2 × 3/2 = 1.5
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Question 19 of 30
19. Question
For the reaction A → B, the rate expression is r = k[A]n. When the concentration of A is doubled, the rate of reaction is quadrupled. The Value of n is
Correct
Let r = k[A]n … (i)
When concentration is doubled then 4r = k(2A)n … (ii)
Divide Eq. (ii) by (i)
4 = 2n
∴ n = 2
Incorrect
Let r = k[A]n … (i)
When concentration is doubled then 4r = k(2A)n … (ii)
Divide Eq. (ii) by (i)
4 = 2n
∴ n = 2
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Question 20 of 30
20. Question
In the reaction, P + Q → R + S the time taken for 75% reaction of P is twice the time taken for 50% reaction of P. The concentration of Q varies with reaction time as shown in the figure. The overall order of the reaction is
Correct
Incorrect
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Question 21 of 30
21. Question
By increase in temperature by 10 K, the rate of reaction becomes double. How many times the rate of reaction will be if the temperature is increased from 303 K to 353 K?
Correct
By increasing 10 K temperature the rate of reaction becomes double. When temperature is increased from 303 K to 353 K. The rate increases in steps of 10° and has been made 5 times. Hence, the rate of reaction should increase 25 times, i.e., 32 times.
Incorrect
By increasing 10 K temperature the rate of reaction becomes double. When temperature is increased from 303 K to 353 K. The rate increases in steps of 10° and has been made 5 times. Hence, the rate of reaction should increase 25 times, i.e., 32 times.
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Question 22 of 30
22. Question
Which of the following graphs represents exothermic reaction?
Correct
For exothermic reaction,
Energy of reactants > energy of product, which is the case given in (i).
Incorrect
For exothermic reaction,
Energy of reactants > energy of product, which is the case given in (i).
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Question 23 of 30
23. Question
For a reaction between gaseous compounds,
2A + B → C + D
The reaction rate = k[A][B]. If the volume of the container is made 1/4 of the initial, then what will be the rate of reaction as compared to the initial rate?
Correct
When volume is reduced to one fourth, concentrations become four times. Hence, the rate of reaction becomes 16 times as compared to the initial rate.
Incorrect
When volume is reduced to one fourth, concentrations become four times. Hence, the rate of reaction becomes 16 times as compared to the initial rate.
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Question 24 of 30
24. Question
The rate constant of a reaction is given by k = 2.1 × 1010 exp (– 2700 RT). It means that
Correct
k = 2.1 × 1010 exp (– 2700/RT)
i.e., log k vs 1/T will be straight line
intercept of log k axis = log 2.1 × 1010
Incorrect
k = 2.1 × 1010 exp (– 2700/RT)
i.e., log k vs 1/T will be straight line
intercept of log k axis = log 2.1 × 1010
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Question 25 of 30
25. Question
Which of the reactions represented in these diagrams will show the greatest increase in rate for a given increase in temperature?
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Question 26 of 30
26. Question
For a single step reaction,
A + 2B → Products, the molecularity is
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Incorrect
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Question 27 of 30
27. Question
Pieces of wood burn faster than a log of wood of the same mass because
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Question 28 of 30
28. Question
Given the following diagram for the reaction
A + B → C + D
The enthalpy change and activation energy for the reverse reaction, C + D → A + B are respectively
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Incorrect
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Question 29 of 30
29. Question
follows first order reaction. (A) → Product Concentration of A, changes from 0.1 M to 0.025 M in 40 min. Find the rate of reaction of A when concentration of A is 0.01 M
Correct
dx/dt = k [A] = 0.03466 × 0.01
= 3.47 × 10–4 M min–1
Incorrect
dx/dt = k [A] = 0.03466 × 0.01
= 3.47 × 10–4 M min–1
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Question 30 of 30
30. Question
For a given reaction.
2H2O2 → 2H2O + O2
Graph between log [H2O2] and time t is of the type Thus, rate law is
Correct
Logarithm function is linear which is for first order reaction.
Log [H2O2]t = – + log [H2O2]0 (constant)
Graph between log [H2O2]t and t is a straight line.
Incorrect
Logarithm function is linear which is for first order reaction.
Log [H2O2]t = – + log [H2O2]0 (constant)
Graph between log [H2O2]t and t is a straight line.