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S(N)2 mechanism proceeds through formati...

`S_(N)2` mechanism proceeds through formation of `:`

A

Free radical

B

Transition state

C

Carbonium ion

D

Carbanion

Text Solution

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The correct Answer is:
B
Mechanism of `SN^2`
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S_(N)1 // S_(N)2 proceeds through the formation of a carbocation.

S_(N)1 // S_(N)2 proceeds through the formation of a carbocation.

Assertion (A) Hydrolysis of (-)-2-bromooctane proceeds with inversion of configuration Reason (R) This reaction proceeds through the formation of a carbocation.

Alkylhalides have polar C-X bond and undergo nucleophilic substitution reactions. These give a variety of products with nucleophiles such as -OH, -OR, -NH_(2), -CN, -NC, -NO_(2), -ONO, RCOO^(-) , etc. They undergo mainly two types of nucleophilic substitution reactions, S_(N)1 and S_(N)2 . S_(N)1 reactions are two steps reactions which proceed through the formation of carbocations while S_(N)2 reactions are one step reaction which proceeds through the formation of transition state. The stability of carbocation and transition state determine the reactivity of alkyl halides. Which out of S_(N)1 or S_(N)2 results into inversion of configuration?

MARVEL PUBLICATION-HALOGEN DERIVATIVES OF ALKANES (AND ARENES)-PREVIOUS YEARS ENTRANCE EXAMS MCQ
  1. Negative inductive effect is shown by

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  2. Chloroform on reduction with zinc and water gives:

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  3. C3H6Cl2 has how many isomers which are vicinal dihalide ?

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  4. Chlorine (Cl^(17)) free radial contains how many electrons around the ...

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  5. Which among following is nucleophile ?

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  6. Reaction of alkyl halides ethanolic KOH is known as

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  7. Which has maximum tendency to form recemate on alkaline hydrolysis ?

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  8. Which of the following on controlled chlorination will not give differ...

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  9. Which of the following compounds most readily undergoes solvolysis by ...

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  10. A chloro derivative (A) on treatment with zinc - copper couple gives a...

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  11. Some statements are given below : (A) In alkyl carbonium ions, C^+ "...

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  12. S(N)2 mechanism proceeds through formation of :

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  13. The most stable carbonium ion is,

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  14. Only two isomeric monochloro derivatives are possible for

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  15. In the adddition of HBr to propene in the absence of peroxides, the fi...

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  16. If 'n' represents total number of asymmetric carbon atoms in a compoun...

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  17. The compound which is not formed when a mixture of n-butyl bromide and...

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  18. While assigning R,S configuration the correct order of priority of gro...

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  19. In assigning R-S configuration , which among the following groups...

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  20. The conversion of ethyl bromide using sodium iodide and dry acetone, ...

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