Match the following species with the nature of their bonds:

- A(A)-(IV), (B)-(III), (C)-(II), (D)-(I)
- B(A)-(III), (B)-(IV), (C)-(II), (D)-(I)
- C(A)-(III), (B)-(IV), (C)-(I), (D)-(II)
- D(A)-(I), (B)-(IV), (C)-(II), (D)-(III)
Solution & Step-by-step Explanation
1. (Ethane): Single bond between carbons. (A-III)2. (Ethene): Double bond between carbons (). (B-IV)3. : Molecular Orbital Theory shows that both bonds in the molecule are bonds due to electrons in orbitals. (C-II)4. (Ethyne): Triple bond between carbons (). (D-I)