Multiple choice

Under the certain conditions an alkyl halide reacts with base to give an alkene and HCl (elimination reaction) for example: R-CH2-CH2-Cl → R-CH2=CH2 + HCl The extent of these reactions depends on the structure of alkyl halides (e.g. primary, secondary or tertiary). The relative extent to which such reactions take place is in the order (of haloalkanes) _______________.

  1. Primary > secondary > tertiary

  2. Primary > secondary > tertiary

  3. Primary > secondary < tertiary

  4. Primary < secondary > tertiary<secondary></secondary>

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This option is correct because on the basis of the stability of carbocation, which is formed during the reaction, i.e., 1˚ < 2˚ < 3˚ alkyl halide.

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