Addition of halogen acid is least in A.CH2=CHCl B.CH2=CH2 C.CH3-CH=CH2 D.(CH3)2C=CH2

halogen-acid

#1

Addition of halogen acid is least in
A.CH2=CHCl
B.CH2=CH2
C.CH3-CH=CH2
D.(CH3)2C=CH2

Answer:

The regiochemistry of this reaction can be explained through Markovnikov’s Rule. The basics of this rule states that the proton (H+) will add to the less substituted carbon and the halogen (X-) goes to the more substituted carbon .
in the above
D) is more substituted and provide steric hinderence to the proton (H+) addition and hence will be least in Addition of halogen acid .