Indicate the `sigma-` and `pi -` bonds in the following molecules:
I. `C_(6) H_(6)` II. `C_(6) H_(12)` III. `CH_(2) CI_(2)`
IV. `CH_(2) = C = CH_(2)` V. `CH_(3) NO_(2)`
VI. `HCONHCH_(3)`

Explanation

To indicate the sigma (σ) and pi (π) bonds in the given molecules, we will analyze each molecule one by one.

### I. C₆H₆ (Benzene)
1. **Structure**: Benzene has a hexagonal structure with alternating double bonds.
2. **Bonds**:
- Each carbon (C) atom forms:
- 1 σ bond with another C atom.
- 1 σ bond with a hydrogen (H) atom.
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