by DeepWebLabs
NEET
Chemistry

Arrhenius Equation

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Consistency: 35%
Weightage: 7 / 20 Yrs

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Questions
10 MCQs

01
PYQ 2008
easy
chemistry ID: neet-200

The rate constants k1 and k2 for two different reactions are 1016. e-2000/T and 1015. e-1000/T, respectively. The temperature at which k1= k2 is:

1. 1000 K

2. 20002.303 K

3. 2000 K

4. 10002.303 K

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2
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3
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4
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02
PYQ 2010
easy
chemistry ID: neet-201

For an endothermic reaction, the energy of activation is Ea, and the enthalpy of reaction is ΔH (both of these in kJ/mol). The minimum value of Ea will be:

1. Less than ∆H

2. Equal to ∆H

3. More than ∆H

4. Equal to zero

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(1)
2
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3
(3)
4
(4)
03
PYQ 2013
easy
chemistry ID: neet-201
What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20oC to 35oC? (R = 8.314 J mol–1 K–1)
1. 269 kJ mol–1 2. 34.7 kJ mol–1
3. 15.1 kJ mol–1 4. 342 kJ mol–1
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2
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04
PYQ 2013
easy
chemistry ID: neet-201

A reaction having equal energies of activation for forward and reverse reaction has:

1. ΔG = 0

2. ΔH = 0

3. ΔH = ΔG = ΔS = 0

4. ΔS = 0

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2
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05
PYQ 2020
easy
chemistry ID: neet-202

What does ZAB represent in the collision theory of chemical reactions?

1. The fraction of molecules with energies greater than Ea
2. The collision frequency of reactants, A and B
3. Steric factor
4. The fraction of molecules with energies equal to Ea
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2
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4
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06
PYQ 2021
easy
chemistry ID: neet-202

The slope of Arrhenius Plot (ln k v/s 1T) of the first-order reaction is -5\times 103 K. The value of Ea of the reaction is:

[Given R = 8.314 JK–1 mol–1]

1. 166 kJ mol–1 2. –83 kJ mol–1
3. 41.5 kJ mol–1 4. 83.0 kJ mol–1
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07
PYQ 2023
hard
chemistry ID: neet-202
Given below are two statements:
Assertion (A): A reaction can have zero activation energy.
Reason (R): The minimum amount of energy required by reactant molecules so that their energy becomes equal to threshold value, is called activation energy.
1. (A) is False but (R) is True.
2. Both (A) and (R) are True and (R) is the correct explanation of (A)
3. Both (A) and (R) are True but (R) is not the correct explanation of (A).
4. (A) is True but (R) is False.
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08
PYQ 2024
easy
chemistry ID: neet-202
Activation energy of any chemical reaction can be calculated if one knows the value of:
1. Probability of collision.
2. Orientation of reactant molecules during collision.
3. Rate constant at two different temperatures.
4. Rate constant at standard temperature.
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09
PYQ 2024
easy
chemistry ID: neet-202
Which plot of In k vs is consistent with Arrhenius equation?
1. 2.
3. 4.
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10
PYQ 2024
medium
chemistry ID: neet-202
The rate of a reaction quadruples when temperature changes from 27°C to 57°C. Calculate the energy of activation.
Given R = 8.314 J K–1 mol–1, log 4 = 0.6021
1. 380.4 kJ/mol 2. 3.80 kJ/mol
3. 3804 kJ/mol 4. 38.04 kJ/mol
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