Question

Identify X, Y, Z in the following series
alc.KOH Br₂ KCN
C₂H₅I ➝ X ➝ Y ➝ Z
(a) BrCH₂CH₂Br
(b) BrCH₂CH₂CN
(c) CN-CH₂ -CH₂-CN
(d) Br-CH=CH-CN

Answer 1

1. when C2H5I react with alc. KOH it will give an alkene that is CH2=CH2
2. when CH2=CH2 react with Br2 it will give BrCH2CH2Br
3. when BrCH2CH2Br react with KCN it will give BrCH2CH2CN

Answer 2

Name of X is ethene (CH₂=CH₂ ), Y is 1,2-dibromo ethane (BrCH₂CH₂Br) and Z is 1,2-dicyano ethane (CNCH2CH2CN).

- When C₂H₅I react with alc. KOH, then it will give an alkene that is CH₂=CH₂ .

- When CH₂=CH₂ react with Br₂, then it will give BrCH₂CH₂Br .

- When BrCH₂CH₂Br react with KCN, then it will give CNCH₂CH₂CN.