Verified Solution • 2025–26 Session moderate

QJEEAdv17Chb424: JEE Advanced 2017 Chemistry - Class 12 JEEAdv17Chb424 Solution: In a bimolecular reaction, the steric factor P was…

In a bimolecular reaction, the steric factor P was experimentally determined to be 4.5. The correct option(s) among the following is (are)

Multiple Choice Options

  • A The activation energy of the reaction is unaffected by the value of the steric factor
  • B Experimentally determined value of frequency factor is higher than that predicted by arrhenius equation
  • C Since P=4.5, the reaction will not proceed unless an effective catalyst is used
  • D The value of frequency factor predicted by Arrhenius equation is higher than that determined experimentally

Step-by-Step Verified Solution

Arrhenius equation is

k=Ae−Ea/RT

where, A = Frequency factor

Taking into account orientation factor,

k=PZABe−Ea/RT

where, P = steric factor, ZAB = collision frequency

The value of steric factor lies between 0 and 1 predicted by Arrhenius equation. Thus, the experimentally determined value of frequency factor is higher than that predicted by Arrhenius equation.

The activation energy of the reaction does not depend upon the value of the steric factor.

If P is very small, then catalyst is required to carry out the reaction at measurable rate.

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