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Class 11
Chemistry
Chemical Bonding and Molecular Structure
what is the total number of sigma and pi bonds in...

Question:
What is the total number of sigma and pi bonds in the following molecules?

(a) C₂H₂ (b) C₂H₄

Answer:

Sigma (σ) bond is the bond formed when the two half -filled atomic orbitals overlap along their inter-nuclear axes. Sigma bond will always represent a single bond.

Pie (π) bond is formed when the two half- filled atomic orbitals belonging to the bonding atoms overlap along sides (sidewise or lateral overlap).

A double bond will always have one sigma bond and one pie bond.

A triple bond will always have one sigma bond and two pie bond. So from the structure of C₂H₂, it is clear that it has three sigma bonds and two pie bonds.

From the structure of C₂H₄,it is clear that it has five sigma bonds & one pie bond.

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Question:
What is the total number of sigma and pi bonds in the following molecules?

(a) C₂H₂ (b) C₂H₄

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Question: What is the total number of sigma and pi bonds in the following molecules? (a) C2H2 (b) C2H4

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Question:
What is the total number of sigma and pi bonds in the following molecules?

(a) C₂H₂ (b) C₂H₄