Which of the following has a large dipole moment? Explain. I-Butyne and I-butene.

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Solution

$H_{3} C - C H_{2} - C \equiv C - H$
$1 - B u t y n e$
Each triply bonded C-atom is sp-hybridised
Each doubly C-atom is $s p^{2}$ -hybridised.
$1 - B u t y n e$ has larger dipole moment because the electronegativity of $s p - C$ is more than that of $s p^{2} - C .$

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