JEE Advanced 2017Paper 2
- Exam
- JEE Advanced
- Year
- 2017
- Paper
- Paper 2
- Subject
- Chemistry
- Chapter
- Chemical Kinetics
JEE Advanced 2017 · Paper 2 · Chemistry · Chemical Kinetics
In a bimolecular reaction, the steric factor P was experimentally...
In a bimolecular reaction, the steric factor was experimentally determined to be . The correct option(s) among the following is(are)
Options
- AThe value of the frequency factor predicted by the Arrhenius equation is higher than that determined experimentally.
- BThe activation energy of the reaction is unaffected by the value of the steric factor.
- CSince , the reaction will not proceed unless an effective catalyst is used.
- DThe experimentally determined value of the frequency factor is higher than that predicated by the Arrhenius equation.
Correct answer
B. The activation energy of the reaction is unaffected by the value of the steric factor.
Step-by-step solution
The Arrhenius equation is
(^{-\mathrm{Ea} / \mathrm{RT}})
where A = Pre-exponential factor
A is not directly related with temperature and activation energy.
Where (A=\underset{\text{ (Frequency factor) }}{Z} \times \underset{\text{ (Steric factor) }}{P})
Hence we can say the (\mathrm{E}_{\mathrm{a}}) is independent of steric factor
(\mathrm{P}=\frac{\mathrm{K}_{\text{actual }}}{\mathrm{K}_{\text{theoretical }}})
So, (A_{\text{actual }}>A_{\text{theoretical }})