Statement-I: High concentration of strong nucleophilic reagent with secondary alkyl halides which do not have bulky substituents will follow mechanism.

STUDY MATERIALS
COURSES
MORE
SUCCESS STORY
ADMISSION
STORE

Back

JEE ADVANCE

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

JEE MAIN

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

NEET

CLASS XI - XII
CRASH COURSE

CLASS XI - XII

CRASH COURSE

BITSAT

CLASS XI - XII

CLASS XI - XII

CBSE BOARD

CLASS IX

CLASS X

CLASS XI

CLASS XII

CLASS VI

CLASS VII

CLASS VIII

UP BOARD

CLASS IX
CLASS X
CLASS XI
CLASS XII

CLASS IX

CLASS X

CLASS XI

CLASS XII

CUET

CRASH COURSE

CRASH COURSE

Courses

CLASSROOM COURSES
ONLINE COURSES

ONLINE COURSES

More

Solution

Q.
Given below are two statements:

Statement-I: High concentration of strong nucleophilic reagent with secondary alkyl halides which do not have bulky substituents will follow ${S_{N}}^{2}$ mechanism.

Statement-II: A secondary alkyl halide when treated with a large excess of ethanol follows ${S_{N}}^{1}$ mechanism.

In the light of the above statements, choose the most appropriate from the options given below: [2024]

1 Statement I is true but Statement II is false.

2 Statement I is false but Statement II is true.

3 Both Statement I and Statement II are false.

4 Both Statement I and Statement II are true.

Ans.
(4)

Secondary alkyl halide follows both $S_{N} 1$ and $S_{N} 2$ paths parallelly. Out of $S_{N} 1$ and $S_{N} 2$ , which one is preferred path by secondary alkyl halide depends upon other conditions such as strength of nucleophile and nature of solvent. Strong nucleophiles such as alkoxides and polar aprotic solvents such as DMF and DMSO prefer to keep the reaction along $S_{N} 2$ pathway. Weak nucleophiles such as water, alcohols and acetic acid and polar protic solvents such as water and alcohols (these are solvents as well as nucleophiles), prefer to keep the reaction along $S_{N} 1$ pathway.

Want Us to Email you About Special Offers & Updates?