Complete the following reactions :
(i) `C_(6)H_(6)+ CH_(3)Cl, anhyd. AlCl_(3) to`
(ii) `CH_(3)C -= C CH_(3) underset((ii) Zn, H_(2)O)overset((i)O_(3)) to `
(iii) `CH_(3)CH_(2)C -=CH underset("Heat")overset("acidic" KmnO_(4))to`

Explanation

Let's complete the reactions step by step:

### (i) Reaction of Benzene with Methyl Chloride in the presence of Anhydrous AlCl3

1. **Identify the reactants**: The reactants are benzene (C6H6) and methyl chloride (CH3Cl).
2. **Recognize the reaction type**: This is a Friedel-Crafts alkylation reaction, where an alkyl group (methyl in this case) is introduced to the aromatic ring.
3. **Role of AlCl3**: Anhydrous AlCl3 acts as a Lewis acid catalyst that helps generate a more reactive methyl cation (CH3+).
4. **Reaction mechanism**:
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