Draw the structures of following compound:
i. 3-Methylbutanal
ii. p-Nitropropiopehnone
iii. P-Methylbenzaldehyde
iv. 4-Methylpent-3-en-2-one
v. 4-Chloropentan-2-one
vi. 3-Bromo-4-phenylpentanoic acid
vii. p-p'-Dihydroxybenzophenone
viii. Hex-2-en-4-ynoic acid

Explanation

To draw the structures of the given compounds, we will follow the systematic approach of identifying the functional groups, the number of carbon atoms, and their respective positions. Here’s the step-by-step solution:

### Step 1: Draw the structure of 3-Methylbutanal
- **Identify the components**: "Butanal" indicates a 4-carbon chain with an aldehyde functional group (-CHO) at one end. The "3-methyl" indicates a methyl group attached to the third carbon.
- **Structure**:
```
CH3
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