Identify the basic salt from the following salts:

Options

A. `Na_(2)CO_(3)`
B. `NH_(4)Cl`
C. `NaNO_(3)`
D. KCl

Explanation

To identify the basic salt from the given options, we need to analyze each salt based on the strength of the acid and base from which it is derived.

### Step-by-Step Solution:

1. **Identify the salts provided in the question:**
- Na2CO3 (Sodium Carbonate)
- NH4Cl (Ammonium Chloride)
- NaNO3 (Sodium Nitrate)
- KCl (Potassium Chloride)

2. **Analyze Na2CO3:**
- Sodium Carbonate (Na2CO3) is formed from a strong base (NaOH) and a weak acid (H2CO3 - Carbonic Acid).
- Since it is derived from a strong base and a weak acid, Na2CO3 is classified as a basic salt.

3. **Analyze NH4Cl:**
- Ammonium Chloride (NH4Cl) is formed from a strong acid (HCl - Hydrochloric Acid) and a weak base (NH4OH - Ammonium Hydroxide).
- Since it is derived from a strong acid and a weak base, NH4Cl is classified as an acidic salt.

4. **Analyze NaNO3:**
- Sodium Nitrate (NaNO3) is formed from a strong base (NaOH) and a strong acid (HNO3 - Nitric Acid).
- Since both the acid and base are strong, NaNO3 is classified as a neutral salt.

5. **Analyze KCl:**
- Potassium Chloride (KCl) is formed from a strong base (KOH) and a strong acid (HCl).
- Similar to NaNO3, since both the acid and base are strong, KCl is also classified as a neutral salt.

6. **Conclusion:**
- From the analysis, the only salt that is classified as a basic salt is Na2CO3 (Sodium Carbonate).

### Final Answer:
The basic salt from the given options is **Na2CO3 (Sodium Carbonate)**.