Question

in the beginning the rate of reverse reaction is​

Answer 1

Answer:

Is simply the reverse reaction of oxidative addition; the formal valence state of the metal is reduced by two (or one, in a bimetallic reaction) and the total electron count of the complex is reduced by two. While oxidative addition can also be observed for main group elements, this reaction is more typical of the transition elements in particular the electronegative, noble metals. In a catalytic cycle the two reactions occur pairwise. At one stage the oxidative addition occurs, followed by, e.g., insertion reactions, and then the cycle is completed by a reductive elimination of the product.