Identify two salts among the following whose solutions have a pH greater than 7 .
i `K_(2)S`
(ii) `NH_(4)Cl`
(iii) `KNO_(3)`
(iv) `CaCO_(3)`
(v) `NH_(4)NO_(3)`

Explanation

To identify two salts among the given options whose solutions have a pH greater than 7, we need to analyze each salt based on the strength of the acid and base from which they are derived. A salt solution will have a pH greater than 7 if it is formed from a strong base and a weak acid.

### Step-by-Step Solution:

1. **Analyze K₂S:**
- **Cation:** K⁺ (from KOH, a strong base)
- **Anion:** S²⁻ (from H₂S, a weak acid)
- Since K₂S is derived from a strong base (KOH) and a weak acid (H₂S), its solution will have a pH greater than 7.
...