JEE Main 2017 · ChemistryMultiple choiceSingle correctEasyCalculation

JEE Main 2 April 2017 (offline), Chemistry Q39

Question 39 of 90 in this shift, Chemistry question 9 of 30.

Two reactions

R_1

and

R_2

have identical pre-exponential factors. Activation energy of

R_1

exceeds that of

R_2

by 10 kJ mol

^{-1}

. If

k_1

and

k_2

are rate constants for reactions

R_1

and

R_2

respectively at 300 K, then

\ln(k_2/k_1)

is equal to : (

R=8.314\ \mathrm{J\,mol^{-1}K^{-1}}

)

(1)6
(2)4Official answer
(3)8
(4)12

Official answer

Option 2

CBSE answer key (25/04/2017, used for result).

Chapter: Chemical Kinetics
Topic: Arrhenius Equation
Idea tested: Arrhenius Exponential Form

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Asked 4× in all

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Question text from the official JEE Main paper published by NTA (CBSE ran the 2017 exam); answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.