Identify X, Y and Z in the following reactions:
(a) `C_(6)H_(6)underset(AlCl_(3))overset(Cl_(2))toXunderset(575K,300atm)overset(aq.NaOH)toYoverset(H^(+),H_(2)O)toZ`
(b) `C_(6)H_(5)NH_(2)underset(273K)overset(NaNO_(2).HCl)toXunderset("Warm")overset(H^(+),H_(2)O)toYunderset("Heat")overset(Zn)toZ`

Explanation

To solve the problem, we need to identify the compounds X, Y, and Z in the given reactions step by step.

### Part (a)

1. **Starting Material**: The reaction starts with benzene, which has the formula \( C_6H_6 \).

2. **Electrophilic Aromatic Substitution**: Benzene reacts with chlorine (\( Cl_2 \)) in the presence of aluminum chloride (\( AlCl_3 \)). This is an example of electrophilic aromatic substitution where one of the hydrogen atoms on the benzene ring is replaced by a chlorine atom.

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