MCQ
When $2-$ butyne is treated with $H_2/$ Lindlar's catalyst, compound $X$ is produced as the major product and when treated with $Na/liq.$ $NH_3$ it produces $Y$ as the major product. Which of the following statements is correct?
  • A
    $Y$ will have higher dipole moment and higher boiling point than $X$
  • B
    $Y$ will have higher dipole moment and lower boiling point than $X$
  • C
    $X$ will have lower dipole moment and lower boiling point than $Y$
  • $X$ will have higher dipole moment and higher boiling point than $Y$

Answer

Correct option: D.
$X$ will have higher dipole moment and higher boiling point than $Y$
d
When $2-$ butyne is treated with $H_2/$ Lindlar's catalyst, compound $X$ (cis $-2-$ butene) is produced as the major product; and when treated with $Na/liq\,NH_3$ it produces $Y$ (trans $-2-$ butene) as the major product. Cisisomer $(X)$ will have higher dipole moment and higher boiling point than trans $(Y)$.

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