How many sigma `(sigma)` and pi `(pi)` bonds are present in each of the following molecules?
(i) `CH_(2) = C = CH_(2)`
(ii) `CH_(3) - CH = CH - C -= C - CH_(3)`
Strategy: Every single covalent bond is a sigma`(sigma)` bond, every double covalent bond consists of one sigma `(sigma)` and one pi `(pi)` bond, and every triple covalent bond consists of one sigma `(sigma)` and two pi `(pi)` bonds.

Explanation

To determine the number of sigma (σ) and pi (π) bonds in the given molecules, we will analyze each molecule step by step.

### (i) For the molecule `CH₂ = C = CH₂`:

1. **Identify the bonds**:
- The molecule consists of:
- Two double bonds (C=C)
- Two single bonds (C-H)
...