How many pi bonds are present in ethene ?
Correct answer: C. 1
- A. 3
- B. 2
- C. 1
- D. 0
Explanation
One C=C will have "one" pi bond in it as a double covalent bond consisting of one pi bond and one sigma bond. Since ethene has formula CH2=CH2, it has "one" pi bond.
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About Sigma and Pi Bonds
A sigma bond forms by direct end-to-end overlap along the internuclear axis, whereas a pi bond forms by sideways overlap of parallel orbitals. The topic covers single, double and triple bonds, bond composition, restricted rotation and the relation between sigma and pi bonding and orbital hybridisation.
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