Give the order of `SN^(-1)` of `SN^(-1)` and `SN^(2)` displacement of halogen `CH_(3)X, 1^(@X, 2^(@)X, 3^(@)X`.

Explanation

To determine the order of SN1 and SN2 reactions for the displacement of halogen from different types of alkyl halides (methyl halides, 1° halides, 2° halides, and 3° halides), we can analyze the mechanisms of both reactions.

### Step-by-Step Solution:

1. **Understanding SN1 Mechanism:**
- The SN1 (Substitution Nucleophilic Unimolecular) mechanism involves the formation of a carbocation intermediate. The rate of the reaction depends on the stability of this carbocation.
- Carbocation stability increases in the order: methyl < 1° < 2° < 3°.
- Therefore, for SN1, the order of reactivity will be:
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