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Organic Chemistry: Some Basic Principles and Techniques — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryOrganic Chemistry: Some Basic Principles and Techniques1 Mark
MCQ
Electronegativity of carbon atoms depends upon their state of hybridisation. In which of the following compounds, the carbon marked with asterisk is most electronegative?
  • A
    $ \mathrm{CH}_3-\mathrm{CH}_2-{ }^* \mathrm{CH}_2-\mathrm{CH}_3 $
  • B
    $ \mathrm{CH}_3-{ } ^*\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_3 $
  • ✓
    $ \mathrm{CH}_3-\mathrm{CH}_2-\mathrm{C} \equiv{ }^* \mathrm{CH} $
  • D
    $ \mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}={ }^* \mathrm{CH}_2$
✓

Answer

Correct option: C.
$ \mathrm{CH}_3-\mathrm{CH}_2-\mathrm{C} \equiv{ }^* \mathrm{CH} $
Electronegativity increases as the state of hybridization changes from $sp^3$ to $sp^2$ and $sp^2$ to sp. Thus, sp hybridized carbon has the highest electronegativity.

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