Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main 201911 JanuaryMorning Shift
Exam
JEE Main
Year
2019
Date
11 January
Shift
Morning Shift
Subject
Chemistry
Chapter
Chemical Kinetics

JEE Main 2019 · 11 January · Morning Shift · Chemistry · Chemical Kinetics

If a reaction follows the Arrhenius equation, the plot k vs 1 (RT)...

If a reaction follows the Arrhenius equation, the plot ln⁡k\ln k vs 1(RT)\frac{1}{(\mathrm{RT})} gives straight line with a gradient (−y)(-\mathrm{y}) unit. The energy required to activate the reactant is:

Options

  1. Ay/Ry / R unit
  2. By unit
  3. CyR unit
  4. D−y-y unit

Correct answer

B. y unit

Step-by-step solution

From Arrhenius equation, k=Ae−En/RTk=A e^{-E_{n} / R T} ln⁡k=ln⁡A−EaRT\ln k=\ln A-\frac{E_{a}}{R T} slope =−y=-y (given) −y=−Es-y=-E_{s} ⇒Ea=y\Rightarrow \mathrm{E}_{\mathrm{a}}=y
Practice Chemical Kinetics on Quantrex Academy →

More from Chemical Kinetics

For a reversible reaction R leftharpoons P , at constant temperature, both the forward… JEE Advanced 2026For a first-order reaction R P at a given temperature, k is the rate constant. For this… JEE Advanced 2026Given below are two statements: R=8.314 J K ^ -1 mol ^ -1 and 1 cal =4.2 J Statement I… JEE Main 2026Decomposition of a hydrocarbon follows the equation k = (5.5 × 10^ 11 \,s^ -1 )\,e^… JEE Main 2026For a reaction A arrow P at T K , the half life (t_ 1/2 ) is plotted as a function of… JEE Main 2026First order gas phase reaction A arrow B + C p_i = initial pressure of gas A, p_t = total… JEE Main 2026If the half life of a first order reaction is 6.93 minutes then the time required for… JEE Main 2026Consider the given graph showing variation of reactant concentration with time. Three… JEE Main 2026 Full Chemical Kinetics list All JEE Main PYQs