Total number of $\sigma$ and $\pi$ bonds in ethene molecule is
Show Hint
- 1\(\sigma\) and 2\(\pi\) bonds
- 5\(\sigma\) and 1\(\pi\) bonds
- 5\(\sigma\) and 2\(\pi\) bonds
- 3\(\sigma\) and 1\(\pi\) bonds
The Correct Option is B
Approach Solution - 1
The problem requires identifying the total number of \(\sigma\) and \(\pi\) bonds in an ethene (\(C_2H_4\)) molecule.
Structure of Ethene (\(C_2H_4\)): The ethene molecule consists of two carbon atoms (\(C\)) and four hydrogen atoms (\(H\)).
Bonding Details:
- Carbon-Carbon Double Bond: The double bond between the two carbon atoms consists of one \(\sigma\) bond and one \(\pi\) bond.
- Carbon-Hydrogen Bonds: Each of the two carbon atoms forms a single \(\sigma\) bond with each of two hydrogen atoms, totaling four \(\sigma\) bonds from carbon to hydrogen.
| Type of Bond | Number of Bonds |
|---|---|
| \(\sigma\) bonds (C-C) | 1 |
| \(\sigma\) bonds (C-H) | 4 |
| \(\pi\) bonds (C-C) | 1 |
Total Bonds:
- Total \(\sigma\) bonds: \(1 + 4 = 5\)
- Total \(\pi\) bonds: \(1\)
Therefore, ethene has 5 \(\sigma\) and 1 \(\pi\) bonds.
Approach Solution -2
To determine the total number of σ and π bonds in an ethene (ethylene) molecule, we must examine its molecular structure. Ethene has the chemical formula C2H4. The structure of ethene consists of:
- Two carbon atoms connected by a double bond.
- Each carbon atom is also single-bonded to two hydrogen atoms.
In a double bond, there is one σ (sigma) bond and one π (pi) bond:
- The σ bond is formed by the direct overlap of atomic orbitals between the two carbon atoms.
- The π bond is formed by the side-by-side overlap of p orbitals above and below the plane of the atoms.
For the ethene molecule, count as follows:
- There are 4 C-H single bonds, contributing 4 σ bonds.
- There is 1 C=C double bond, which contributes 1 σ bond and 1 π bond.
| Type of Bond | Number |
|---|---|
| σ bonds (total) | 5 |
| π bonds (total) | 1 |
Hence, the total number of bonds in the ethene molecule is 5 σ and 1 π bond.
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