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BITSAT 2019
Exam
BITSAT
Year
2019
Subject
Chemistry
Chapter
Hydrocarbons

BITSAT 2019 · Chemistry · Hydrocarbons

Which of the following compounds contain all the carbon atoms in...

Which of the following compounds contain all the carbon atoms in the same hybridisation state

Options

  1. AH−C≡C−C≡C−HH - C ≡ C - C ≡ C - H
  2. BCH3−C≡C−CH3{CH}_{3} - C ≡ C - {CH}_{3}
  3. CCH2=C=CH2{CH}_{2} = C = {CH}_{2}
  4. DCH2=CH−C≡CH{CH}_{2} = CH - C ≡ CH

Correct answer

A. H−C≡C−C≡C−HH - C ≡ C - C ≡ C - H

Step-by-step solution

Key idea pipi-bond do not participate in hybridisation

In H−C≡C−C=−H all carbon atoms are in same hybridization state i.e., sp hybridized.

a. H−Csp≡Csp−Csp≡Csp−HH - \overset{sp}{C} ≡ \overset{sp}{C} - \overset{sp}{C} ≡ \overset{sp}{C} - H

b. CH3sp3−Csp≡Csp−CH3sp3\overset{{sp}^{3}}{{CH}_{3}} - \overset{sp}{C} ≡ \overset{sp}{C} - \overset{{sp}^{3}}{{CH}_{3}}

c. CH2sp2=Csp=CH2sp2\mathop{{CH}_{2}}_{{sp}^{2}} = \mathop{C}_{sp} = \overset{{sp}^{2}}{{CH}_{2}}

d. CH2sp2=CH−sp2Csp≡CHsp\mathop{{CH}_{2}}_{{sp}^{2}} = \mathop{CH -}_{{sp}^{2}}\mathop{C}_{sp} ≡ \mathop{CH}_{sp}

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