Question:
Which halide will be least reactive in respect to hydrolysis?
Which halide will be least reactive in respect to hydrolysis?
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Tertiary halides are the least reactive in nucleophilic substitution reactions due to the stability of the carbocation.
Updated On: Apr 22, 2026
- Vinyl chloride
- Allyl chloride
- Ethyl chloride
- t-Butyl chloride
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the hydrolysis reaction.
Hydrolysis of alkyl halides involves the substitution of the halide by a hydroxyl group. The reactivity depends on the type of halide and the stability of the carbocation that forms during the reaction.
Step 2: Explanation of the options.
- (1) Vinyl chloride: Vinyl chloride undergoes nucleophilic substitution, but it is less reactive than allyl chloride.
- (2) Allyl chloride: Allyl chloride forms a resonance-stabilized carbocation, making it more reactive to hydrolysis.
- (3) Ethyl chloride: Ethyl chloride is a primary halide, which is less reactive than allyl chloride but more reactive than t-butyl chloride.
- (4) t-Butyl chloride: t-Butyl chloride is a tertiary halide and is least reactive towards hydrolysis due to the stability of its tertiary carbocation.
Step 3: Conclusion.
The correct answer is (2) Allyl chloride.
Hydrolysis of alkyl halides involves the substitution of the halide by a hydroxyl group. The reactivity depends on the type of halide and the stability of the carbocation that forms during the reaction.
Step 2: Explanation of the options.
- (1) Vinyl chloride: Vinyl chloride undergoes nucleophilic substitution, but it is less reactive than allyl chloride.
- (2) Allyl chloride: Allyl chloride forms a resonance-stabilized carbocation, making it more reactive to hydrolysis.
- (3) Ethyl chloride: Ethyl chloride is a primary halide, which is less reactive than allyl chloride but more reactive than t-butyl chloride.
- (4) t-Butyl chloride: t-Butyl chloride is a tertiary halide and is least reactive towards hydrolysis due to the stability of its tertiary carbocation.
Step 3: Conclusion.
The correct answer is (2) Allyl chloride.
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