Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2019ChemistryHaloalkanes and HaloarenesActual

Which of the following is not correct?

Options

  1. APhCH ₂ Br PhCHBrCH Ph ₃ PhCBr ( CH ₃ )₂ ( ~S _ N 1 )
  2. BR - I R - Br R - Cl ( S _N 2 )
  3. Carray r CH ₂= CH - Cl CH ₂= CH - CH ₂- Cl PhCH ₂- Cl ( S ₂ 1 ) array
  4. DR - Cl R - Br R - l ( S _ N 1 )

Correct answer

A. PhCH ₂ Br PhCHBrCH Ph ₃ PhCBr ( CH ₃ )₂ ( ~S _ N 1 )

Step-by-step solution

Key Idea In S _ N 1 reactions, carbocations are the intermediates. Greater the stability of carbocation more easily it is formed and hence, faster will be the rate of reaction. The stability of carbocation decreases in the order. 3^ carbocation 2^ carbocation 1^ carbocation. Thus, option (a) is incorrect while trends in other options are correct.

Practice Haloalkanes and Haloarenes on Quantrex Academy →

More from Haloalkanes and Haloarenes

Which of the following reactions can convert chlorobenzene into toluene? 2026Identify best method for preparation of Alkyl fluoride from following 2026Identify the chemical name of the commonly used refrigerant Freon 12 2026Which of the following alkyl halides gives a mixture of alkenes on dehydrohalogenation? 2026Which order of kinetics is followed by the reaction between tert-butyl bromide and hydroxide ion to give tert-Butyl alcohol? 2026Above reaction is known as 2026Which of the following product obtained when alkyl chloride react with aq KOH at room temperature? 2026Chlorobenzene reacts with Mg in dry ether to give a compound A, which further reacts with ethanol to give B. Identify B. 2026 Full Haloalkanes and Haloarenes list All NEET PYQs