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Chemical Bonding and Molecular Structure — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryChemical Bonding and Molecular Structure1 Mark
MCQ
The nodal plane in the $\pi^-$bond of ethene is located in:
  • ✓
    The molecular plane
  • B
    A plane parallel to the molecular plane.
  • C
    A plane perpendicular to the molecular plane which bisects the carbon-carbon $\sigma^-$ bond at right angle.
  • D
    A plane perpendicular to the molecular plane which contains the carbon-carbon $\sigma^-$ bond.
✓

Answer

Correct option: A.
The molecular plane
The nodal plane in the $\pi -$bond of ethene is located in the molecular plane.$ A \pi^-$ bond has a nodal plane passing through the two bonded nuclei, i.e., molecular plane.
In ethene, there are five sigma bonds in one plane: one $C−C$ sigma bond and four $C−H$ sigma bonds.
The $\pi^-$ bond is formed perpendicular to the plane in which one lobe of electron density is above the plane and one lobe of electron density is below the plane.
The nodal plane of the $\pi^-$ bond is in between the two lobes of electron density of the $\pi^-$ bond.
The nodel plane in the $pi -$ bound of ethene is located in:

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