wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Which of these reactions are possible?

JEE Main 2020 Paper With Solutions Chemistry Shift 2


A

A and D

No worries! We‘ve got your back. Try BYJU‘S free classes today!
B

B and D

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C

B, C, and D

No worries! We‘ve got your back. Try BYJU‘S free classes today!
D

A and B

No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B

B and D


Aryl halides

Aryl halides are frequently used as synthetic intermediates in the manufacture of other natural antioxidants. Chlorobenzene, for example, is a source of benzenol as well as the initiating aryl halide for DDT manufacturing.

Vinyl halide

A vinyl halide is an inorganic compound. Any alkenyl group is repeatedly alluded to as vinyl. As a basis, alkenyl halides exhibiting the formula RCH=CHX are often known as vinyl halides.

The explanation for correct reaction (options B):

  1. Because chlorine creates partial double bonds in aryl halides, the aryl cation is not created.
  2. Because the intermediate produced (vinyl cation) is unstable, vinyl halides do not undergo the Friedel-Crafts process.

JEE Main 2020 Papers With Solutions Chemistry Shift 2

The explanation for incorrect reactions (options A, C, and D):

  1. Due to the resonance stabilization and sp2 hybridization of the C linked to the halide, aryl halide is less reactive than alkyl halide towards nucleophilic substitution.
  2. Resonance causes the carbon-chlorine bond to take on the characteristics of a partial double bond, which makes it shorter and stronger and prevents nucleophiles from quickly replacing it.
  3. The sp2 character of the C atom, to which chlorine is bonded, further strengthens this impact.

Conclusion

Therefore, the correct option is B.


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Reactions of Haloarenes
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon