In a biomolecular reaction, the steric factor $P$ was experimentally determined to be 4.5 . The corr

Question

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

Professor PC Thomas Classes · Answer

( $\mathrm{a}, \mathrm{c}$ ) : Arrhenius equation is\ $k=A e^{-E_{d} / R T}$, where, $A=$ Frequency factor\ Taking into account orientation factor, $k$ $=P Z_{A B} e^{-E_{a} / R T}$\ where, $P=$ steric factor, $Z_{A B}=$ 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.\