Q.

CH3CH2Cl alcoholic KOHA Br2/CCl4B Zn alcohol/ΔC. Here 'C' is:

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya

a

Ethane

b

Ethylene

c

Acetylene

d

Methane

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Solution for the Given Reaction Sequence

Step 1: Dehydrohalogenation (Alcoholic KOH)

  • Reactant: CH₃CH₂Cl (ethyl chloride)
  • Reagent: Alcoholic KOH

Reaction: The reaction with alcoholic KOH leads to the elimination of HCl, forming ethene (CH₂=CH₂) as product A.

CH₃CH₂Cl → CH₂=CH₂ (A)  

Step 2: Addition of Bromine in CCl₄

  • Reactant: CH₂=CH₂ (ethene) (A)
  • Reagent: Br₂ in CCl₄

Reaction: Ethene reacts with bromine to undergo an electrophilic addition reaction, forming 1,2-dibromoethane (CH₂Br-CH₂Br) as product B.

CH₂=CH₂ + Br₂ → CH₂Br-CH₂Br (B)

Step 3: Reaction with Zn/Alcohol

  • Reactant: CH₂Br-CH₂Br (1,2-dibromoethane) (B)
  • Reagent: Zn/Alcohol, followed by heating (Δ)

Reaction: Zinc in alcohol reduces 1,2-dibromoethane to ethyne (C₂H₂) by removing two bromine atoms as ZnBr₂. The final product C is ethyne.

CH₂Br-CH₂Br → C₂H₂ (C)

Final Products

  • A: Ethene (CH₂=CH₂)
  • B: 1,2-Dibromoethane (CH₂Br-CH₂Br)
  • C: Ethyne (C₂H₂)

Answer: The final product C is ethyne (C₂H₂).

Question Image

Watch 3-min video & get full concept clarity

tricks from toppers of Infinity Learn

score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

whats app icon