The central carbon in a carbocation is .......... hybridised.

Explanation

To determine the hybridization of the central carbon in a carbocation, we can follow these steps:

### Step 1: Understand the Structure of a Carbocation
A carbocation is a positively charged carbon atom that has only six electrons in its valence shell. This is due to the loss of one electron, which results in a positive charge.

**Hint:** Remember that carbocations have a positive charge due to the absence of one electron.

### Step 2: Draw the Lewis Structure
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