The type of reaction which the bonds are forming and breaking at the same time i
ID: 520050 • Letter: T
Question
The type of reaction which the bonds are forming and breaking at the same time is known as a: a. polarized reaction b. reversal reaction c. concerted reaction d. Consortium states e. nucleophilic substitution formation Assuming no other changes, what is the effect of doubling only the concentration of the nucleophile in the below reaction? a. no change b. doubles the rate C. triples the rate d. quadruples the rate e. rate is halve Which of the following represents the relative leaving group abilities of the halides? (best leaving group to worst leaving group) a. iodide chloride > fluoride b. iodide > chloride > bromide > fluoride. c. iodide bromide > chloride > fluoride e. iodideExplanation / Answer
2. ans: E. nuclophilic substitution formation
in this mechanism as bonds are breaking, new bonds formed
3. ANS: A
increasing the nucleophile concentration does not effect the rate, where as increasing the substrate will increase the rate only, the rate of reaction depend only on concentration of reactants (substance) only.
4.ans: D
F< Cl<Br<I or as given iodine(excellent)>bromide>chloride>fluoride( worst)
as size increases the ability of leaving group to leave increases.weak bases are best leaving group, as u move down the group the basicity decreases,so the ability of leaving increase.
5.ans: E, both I and II
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