Question

Match List I with List II.

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

Choose the correct answer from the options given below:

• A. A-I, B-IV, C-II, D-III
• B. A-IV, B-III, C-II, D-I
• C. A-III, B-IV, C-II, D-I
• D. A-III, B-IV, C-I, D-II

Answer 1

The Correct Option is C

Step 1: Analyze Ethane (\( C_2H_6 \)) Bonding

Ethane features a single \( \sigma \)-bond connecting the two carbon atoms.

Step 2: Analyze Ethene (\( C_2H_4 \)) Bonding

Ethene possesses one \( \sigma \)-bond and one \( \pi \)-bond between its carbon atoms.

Step 3: Analyze Carbon Molecule (\( C_2 \)) Bonding

The \( C_2 \) molecule contains two \( \pi \)-bonds between carbon atoms, lacking a \( \sigma \)-bond.

Step 4: Analyze Ethyne (\( C_2H_2 \)) Bonding

Ethyne exhibits one \( \sigma \)-bond and two \( \pi \)-bonds between carbon atoms.

Step 5: Match with List II

A-III: Ethane: one \( \sigma \)-bond.

B-IV: Ethene: one \( \sigma \)-bond and one \( \pi \)-bond.

C-II: Carbon molecule (\( C_2 \)): two \( \pi \)-bonds.

D-I: Ethyne: one \( \sigma \)-bond and two \( \pi \)-bonds.

Step 6: Conclusion

The correct pairings are: A-III, B-IV, C-II, D-I.