Medium
Assertion $(A)$ : $A$ catalyst increases the rate of a reaction.
Reason $(R)$ : In presence of a catalyst, the activation energy of the reaction increases.
The correct answer is
Reason $(R)$ : In presence of a catalyst, the activation energy of the reaction increases.
The correct answer is
- ABoth $(A)$ and $(R)$ are true and $(R)$ is the correct explanation of $(A)$
- BBoth $(A)$ and $(R)$ are true but $(R)$ is not the correct explanation of $(A)$
- C$(A)$ is true, but $(R)$ is not true
- D$(A)$ is not true, but $(R)$ is true
Explore More
Similar Questions
How are the values of $E_a$ and $A$ obtained from the Arrhenius equation?
Easy
View Solution$A$ reaction takes place in three steps with individual rate constants and activation energies. The overall rate constant is given by $k = (\frac{k_1 k_2}{k_3})^{2/3}$. The overall activation energy of the reaction in $kJ/mol$ is:
$Step$ $Rate\ Constant\ /\ Activation\ energy$ $Step\ 1$ $k_1, E_{a_1} = 180\ kJ/mol$ $Step\ 2$ $k_2, E_{a_2} = 80\ kJ/mol$ $Step\ 3$ $k_3, E_{a_3} = 50\ kJ/mol$
| $Step$ | $Rate\ Constant\ /\ Activation\ energy$ |
| $Step\ 1$ | $k_1, E_{a_1} = 180\ kJ/mol$ |
| $Step\ 2$ | $k_2, E_{a_2} = 80\ kJ/mol$ |
| $Step\ 3$ | $k_3, E_{a_3} = 50\ kJ/mol$ |
Difficult
View SolutionThe rate of a reaction quadruples when temperature changes from $27^{\circ} C$ to $57^{\circ} C$. Calculate the energy of activation.
Given $R=8.314 \ J \ K^{-1} \ mol^{-1}, \log 4=0.6021$
Given $R=8.314 \ J \ K^{-1} \ mol^{-1}, \log 4=0.6021$
MediumNEET 2024
View SolutionFor the reaction $CH_{3}CH_{2}CH_{2}I + OH^{-} \rightarrow CH_{3}CH_{2}CH_{2}OH + I^{-}$,the rate constant is $1.84 \ (mol \ L^{-1})^{-1} \ min^{-1}$ at $27^{\circ}C$ $(300 \ K)$ and $38.84 \ (mol \ L^{-1})^{-1} \ min^{-1}$ at $327 \ K$. Calculate the activation energy $(E_{a})$ in $cal \ mol^{-1}$.
Medium
View SolutionActivation energy of a reaction is
Medium
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo