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NEET 2026 (Phase 1) · ChemistryPrevious Year Question

In the following reaction sequence, and respectively are :

Answer: (B) (B) ; . Propan-1-ol with gives 1-chloropropane plus phosphorus oxychloride and HCl, so (this single-mole stoichiometry shown gives , not ).

  1. A.(A) ;
  2. B.(B) ; ✓
  3. C.(C) ;
  4. D.(D) ;

Correct Answer

(B) (B) ;

Solution & Explanation

Propan-1-ol with gives 1-chloropropane plus phosphorus oxychloride and HCl, so (this single-mole stoichiometry shown gives , not ). Alcoholic KOH then dehydrohalogenates 1-chloropropane to propene (). Propene with HBr in the presence of peroxide adds anti-Markovnikov (peroxide effect), placing Br on the terminal carbon to give 1-bromopropane ().

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