State the hybridisation of carbon atom in carbonyl group.

Explanation

To determine the hybridization of the carbon atom in the carbonyl group, we can follow these steps:

### Step 1: Identify the Structure of the Carbonyl Group
The carbonyl group (C=O) is found in both aldehydes and ketones. In an aldehyde, the carbonyl group is at the end of the carbon chain, while in a ketone, it is located within the chain.

### Step 2: Analyze the Example Structures
For example:
- In acetaldehyde (an aldehyde), the structure is CH₃CHO.
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