Which of the following are examples of disproportionation reactions?
a. `Ag(NH_(3))_(2)^(o+)+2H^(o+)rarrAg^(o+)+2overset(o+)NH_(4)`
b. `Cl_(2)+2overset(ө)OHrarrClO^(ө)+Cl^(ө)+H_(2)O`
c. `CaCO_(3)rarrCaO+CO_(2)`
c. `CaCO_(3)rarrCaO+CO_(2)`
d. `2HgOrarr2Hg+O_(2)`
e. `Cu_(2)O+2H^(o+)rarrCu+Cu^(2+)+H_(2)O`
f. `CuS+O_(2)rarrCu+SO_(2)`
g. `2HCuCl_(2)+"dilute with" H_(2)OrarrCu+Cu^(2+)+4Cl^(ө)+2H^(o+)`
h. `2H_(2)O_(2)rarr2H_(2)O+O_(2)`

Explanation

To determine which of the given reactions are examples of disproportionation reactions, we need to understand what a disproportionation reaction is. A disproportionation reaction is a specific type of redox reaction in which a single substance is both oxidized and reduced, resulting in the formation of two different products.

Now, let's analyze each reaction step by step:

### Step 1: Analyze Reaction a
**Reaction:** `Ag(NH3)2^+ + 2H^+ → Ag + 2NH4^+`

- **Oxidation States:**
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