Classification Of Organic Compounds

Step 1: Analyze the Bonding in Ethane ( $C_2H_6$ )

Ethane contains a single $%5Csigma$ -bond between two carbon atoms.

Step 2: Analyze the Bonding in Ethene ( $C_2H_4$ )

Ethene has one $%5Csigma$ -bond and one $%5Cpi$ -bond between the carbon atoms.

Step 3: Analyze the Bonding in Carbon Molecule ( $C_2$ )

The $C_2$ molecule contains two $%5Cpi$ -bonds between carbon atoms, with no $%5Csigma$ -bond.

Step 4: Analyze the Bonding in Ethyne ( $C_2H_2$ )

Ethyne has one $%5Csigma$ -bond and two $%5Cpi$ -bonds between carbon atoms.

Step 5: Match with List II

A-III: Ethane has one $%5Csigma$ -bond.

B-IV: Ethene has one $%5Csigma$ -bond and one $%5Cpi$ -bond.

C-II: Carbon molecule ( $C_2$ ) has two $%5Cpi$ -bonds.

D-I: Ethyne has one $%5Csigma$ -bond and two $%5Cpi$ -bonds.

Step 6: Conclusion

The correct match is: A-III, B-IV, C-II, D-I.

List I (Molecule)		List II (Number and types of bond/s between two carbon atoms)
A.	ethane	I.	one σ-bond and two π-bonds
B.	ethene	II.	two π-bonds
C.	carbon molecule, C₂	III.	one σ-bonds
D.	ethyne	IV.	one σ-bond and one π-bond

Chapter Questions
1 MCQs