JEE Main201815 Apr 2018Evening ShiftChemistryHydrocarbonsActual
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?
Options
- AY will have higher dipole moment and higher boiling point than X Y
- BY will have higher dipole moment and lower boiling point than X
- CX will have lower dipole moment and lower boiling point than Y
- DX will have higher dipole moment and higher boiling point than Y
Correct answer
D. X will have higher dipole moment and higher boiling point than Y
Step-by-step solution
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 ) .