CH2=CH2+Br2→X→aq KOHZZ is

The reaction sequence involves the following steps:Reaction of ethene (CH₂=CH₂) with bromine (Br₂):Ethene undergoes an addition reaction with bromine to form 1,2-dibromoethane (X).Reaction of 1,2-dibromoethane with aqueous KOH:Aqueous KOH causes a nucleophilic substitution, where the bromine atoms are replaced by hydroxyl groups (-OH), leading to the formation of ethylene glycol (B).Reaction StepsStep 1: Addition ReactionCH₂=CH₂ + Br₂ → BrCH₂-CH₂Br (1,2-dibromoethane, X)Step 2: Nucleophilic SubstitutionBrCH₂-CH₂Br + 2KOH (aq) → HOCH₂-CH₂OH + 2KBr (ethylene glycol, Z)Explanation for Correct Option (B - Glycol)The intermediate 1,2-dibromoethane reacts with aqueous KOH, replacing both bromine atoms with hydroxyl groups (-OH). The final product is ethylene glycol (HOCH₂-CH₂OH).Thus, the correct answer is B) Glycol.

CH2=CH2+Br2→X→aq KOHZZ is

The reaction sequence involves the following steps:Reaction of ethene (CH₂=CH₂) with bromine (Br₂):Ethene undergoes an addition reaction with bromine to form 1,2-dibromoethane (X).Reaction of 1,2-dibromoethane with aqueous KOH:Aqueous KOH causes a nucleophilic substitution, where the bromine atoms are replaced by hydroxyl groups (-OH), leading to the formation of ethylene glycol (B).Reaction StepsStep 1: Addition ReactionCH₂=CH₂ + Br₂ → BrCH₂-CH₂Br (1,2-dibromoethane, X)Step 2: Nucleophilic SubstitutionBrCH₂-CH₂Br + 2KOH (aq) → HOCH₂-CH₂OH + 2KBr (ethylene glycol, Z)Explanation for Correct Option (B - Glycol)The intermediate 1,2-dibromoethane reacts with aqueous KOH, replacing both bromine atoms with hydroxyl groups (-OH). The final product is ethylene glycol (HOCH₂-CH₂OH).Thus, the correct answer is B) Glycol.

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CH₂=CH₂+Br₂→X→^aq KOHZZ is

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Ethane

Glycol

Ethene

Ethanol

answer is B.

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Detailed Solution

The reaction sequence involves the following steps:

Reaction of ethene (CH₂=CH₂) with bromine (Br₂):
Ethene undergoes an addition reaction with bromine to form 1,2-dibromoethane (X).
Reaction of 1,2-dibromoethane with aqueous KOH:
Aqueous KOH causes a nucleophilic substitution, where the bromine atoms are replaced by hydroxyl groups (-OH), leading to the formation of ethylene glycol (B).

Reaction Steps

Step 1: Addition Reaction

CH₂=CH₂ + Br₂ → BrCH₂-CH₂Br (1,2-dibromoethane, X)

Step 2: Nucleophilic Substitution

BrCH₂-CH₂Br + 2KOH (aq) → HOCH₂-CH₂OH + 2KBr (ethylene glycol, Z)

Explanation for Correct Option (B - Glycol)

The intermediate 1,2-dibromoethane reacts with aqueous KOH, replacing both bromine atoms with hydroxyl groups (-OH). The final product is ethylene glycol (HOCH₂-CH₂OH).

Thus, the correct answer is B) Glycol.