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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
Which is not characteristic of $\pi-$ bond ?
  • A
    $\pi-$ bond is formed when a sigma bond already formed.
  • ✓
    $\pi-$ bond are formed from hybrid orbitals.
  • C
    $\pi-$ bond may be formed by the overlapping of $p-$ orbitals.
  • D
    $\pi-$ bond results from lateral overlap of atomic orbitals.
✓

Answer

Correct option: B.
$\pi-$ bond are formed from hybrid orbitals.
$\pi-$ bonds are formed from unhybridized orbitals.
Thus in ethylene, unhybridized $2p$ orbital of one $C$ atom overlaps with unhybridized $2p$ orbital of second $C$ atom to form $\pi-$ bond.

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