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8.2 Organic chemistry isomerism — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry8.2 Organic chemistry isomerism1 Mark
MCQ
The correct statement regarding ethane conformation is :
  • A
    Rotation around carbon-carbon bond in ethane molecule is not possible, because ethane molecule contains a pi $(\pi)$ bond between the carbon and carbon and ethane has very low melting point.
  • B
    Rotation around carbon-carbon bond in ethane molecule is not possible, because ethane molecule contains both sigma $(\sigma)$ bond, and pi $(\pi)$ bond between the carbon and carbon.
  • ✓
    Rotation around carbon-carbon bond in ethane molecule is possible because of cylindrical symmetry of sigma $(\sigma)$ bond between carbon-carbon atoms
  • D
    Rotation around carbon-carbon bond in ethane molecule is not possible, because ethane molecule contains both sigma $(\sigma)$ bond and pi $(\pi)$ bond between the carbon and carbon and ethane has very high boiling point.
✓

Answer

Correct option: C.
Rotation around carbon-carbon bond in ethane molecule is possible because of cylindrical symmetry of sigma $(\sigma)$ bond between carbon-carbon atoms
c
ઈથેન અણુમાં કાર્બન-કાર્બન બંધની આસપાસ પરિભ્રમણ, શક્ય છે કારણ કે કાર્બન-કાર્બન પરમાણુએ વચ્ચે સિગ્મા $(\sigma)$ બંધની નળાકાર સંમિતિ છે.

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