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The correct statements among following about Maxwell, Boltzmann distribution of energy is -

(a) The fraction of molecules with the most probable kinetic energy decreases at higher temperatures
(b) The fraction of molecules with the most probable kinetic energy increases at higher temperatures
(c) Most probable kinetic energy increases at higher temperatures
(d) Most probable kinetic energy decreases at higher temperatures


1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)

Subtopic:  Arrhenius Equation |
Level 3: 35%-60%
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For a reaction AB, enthalpy of reaction is -4.2 kJmol-1 and enthalpy of activation is 9.6 kJmol-1. The correct potential energy profile for the reaction is:

1. 2.
3. 4.
Subtopic:  Arrhenius Equation |
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Level 2: 60%+
NEET - 2021
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During decomposition of an activated complex

(a) Energy is always released.
(b) Energy is always absorbed.
(c) Energy does not change.
(d) Reactants may be formed.

The correct choice among the given is -
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Arrhenius Equation |
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Level 2: 60%+
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The correct representation of an exothermic reaction is:

1.  2.
3. 4. Both 1 and 2
Subtopic:  Arrhenius Equation |
 85%
Level 1: 80%+
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The correct statements among the following regarding the Arrhenius equation is/are -

(a) Rate of a reaction increases with an increase in temperature
(b) Rate of a reaction increases with a decrease in activation energy
(c) Rate constant decreases exponentially with an increase in temperature
(d) Rate of reaction decreases with a decrease in activation energy


1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Arrhenius Equation |
 79%
Level 2: 60%+
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Rate constant (k) and temperature (T) are related  as : 

1. \(k \,\, = A\, \, e^{\frac{-E_{a}}{RT}}\)
2. \(k \,\, = A\, \, e^{\frac{RT}{-E_{a}}}\)
3. \(k \,\, = A\, \, e^{\frac{E_{a}}{RT}}\)
4. None of the above
Subtopic:  Arrhenius Equation |
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Level 1: 80%+
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The correct statement based on the graph below is:
  

1. The activation energy of the forward reaction is E1 + E2 and the product is less stable than reactant.
2. The activation energy of the forward reaction is E1 + E2 and the product is more stable than the reactant.
3. The activation energy of both forward and backward reaction is E+ E2 and reactant is more stable than the product.
4. The activation energy of the backward reaction is E1 and the product is more stable than reactant.
Subtopic:  Arrhenius Equation |
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The correct statements among the following regarding Maxwell, Boltzmann distribution curve of energy is -

a. The area under the curve must not change with an increase in temperature.
b. The area under the curve increases with increase in temperature.
c. Area under the curve decreases with increase in temperature.
d. With an increase in temperature curve broadens and shifts to the right-hand side.


1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Arrhenius Equation |
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The correct graphical representation of relation between ln k and 1/T is:

1.  2.
3. 4.
Subtopic:  Arrhenius Equation |
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The activation energy of a chemical reaction can be calculated by:

1. Determining the rate constant at standard temperature.
2. Determining the rate constant at two temperatures.
3. Determining probability of collision.
4. Using the catalyst.
Subtopic:  Arrhenius Equation |
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Level 2: 60%+
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