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9. Hydricarbon — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry9. Hydricarbon1 Mark
MCQ
In which of the following reactions $1,3$ butadiene will be obtained as a major product?
  • A
    $Br - CH_2 - CH_2 - CH_2 -CH_2 - Br \xrightarrow[{{(C{{H}_{3}})}_{3}}COH]{{{(C{{H}_{3}})}_{3}}COK(2\,mole)}$
  • B
    $HO - CH_2 -CH_2 -CH_2 - CH_2 -OH \xrightarrow{Conc.{{H}_{2}}S{{O}_{4}}}$
  • C
    ${{H}_{2}}C=CH-C\equiv CH\xrightarrow[N{{i}_{2}}B]{{{H}_{2}}(1\,mole)}$
  • ✓
    All of these
✓

Answer

Correct option: D.
All of these
d
$(d)$ In $(a)$ $E_2$ reaction take place.
In $(b)$ dehydration take place.
In $(c)$ alkyne is more reactive than alkene toward catalytic reductions.

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