Identify and indicate the presence of centre of chirality, if any, in the following molecules? How many stereoisomers are possible for each ?
(i) 2-Aminobutane (ii) 3-Bromopent-1-ene (iii) 1, 2-Dichloropropane, (iv) 3-Methyl-1-pentene

Explanation

To solve the question, we will analyze each molecule step by step to identify any chiral centers and determine the number of stereoisomers possible for each.

### (i) 2-Aminobutane
1. **Structure**: The structure of 2-aminobutane is CH3-CH(NH2)-CH2-CH3.
2. **Chirality**: The carbon atom at the second position (C2) is attached to four different groups:
- NH2 (amino group)
- CH3 (methyl group)
- CH2CH3 (ethyl group)
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