Match the column I with column II and mark the appropriate choice.
`{:(,"Column I"," Column-II"),((A),CH_(3)COONa,("i")"Almost neutral"pHgt7orlt7),((B),NH_(4)Cl,("ii")"Acidic"","pHlt7),((C),NaNO_(3),("iii")"Alkaline"","pHgt7),((D),AgCN,("iv")"Neutrel"","pH=7):}`

Options

A. (A) `to` (i) , (B) `to` (ii) , (C )`to` (iii) , (D) `to` (iv)
B. (A) `to` (ii) , (B) `to` (iii) , (C )`to` (iv) , (D) `to` (i)
C. (A) `to` (iii) , (B) `to` (ii) , (C )`to` (iv) , (D) `to` (i)
D. (A) `to` (iv) , (B) `to` (i) , (C )`to` (iii) , (D) `to` (ii)

Answer

To solve the problem of matching the salts from Column I with their corresponding pH characteristics in Column II, we can follow these steps:

### Step 1: Analyze Each Salt

1. **CH₃COONa (Sodium Acetate)**:
- This salt is formed from a weak acid (acetic acid, CH₃COOH) and a strong base (sodium hydroxide, NaOH).
- Since the acid is weak and the base is strong, the resulting solution will be basic (alkaline).
- **Conclusion**: pH > 7 (Alkaline).

2. **NH₄Cl (Ammonium Chloride)**:
- This salt is formed from a weak base (ammonia, NH₃) and a strong acid (hydrochloric acid, HCl).
- Since the base is weak and the acid is strong, the resulting solution will be acidic.
- **Conclusion**: pH < 7 (Acidic).

3. **NaNO₃ (Sodium Nitrate)**:
- This salt is formed from a strong base (sodium hydroxide, NaOH) and a strong acid (nitric acid, HNO₃).
- Since both the acid and base are strong, they will neutralize each other completely, resulting in a neutral solution.
- **Conclusion**: pH = 7 (Neutral).

4. **AgCN (Silver Cyanide)**:
- This salt is formed from a weak acid (hydrocyanic acid, HCN) and a weak base (silver hydroxide, AgOH).
- Since both the acid and base are weak, the resulting solution may be slightly acidic or basic, but generally, it is considered almost neutral.
- **Conclusion**: pH ≈ 7 (Almost Neutral).

### Step 2: Match the Salts with Their pH Characteristics

Now that we have determined the pH characteristics of each salt, we can match them with the options provided in Column II:

- **A (CH₃COONa)** matches with **(iii)** "Alkaline" (pH > 7).
- **B (NH₄Cl)** matches with **(ii)** "Acidic" (pH < 7).
- **C (NaNO₃)** matches with **(iv)** "Neutral" (pH = 7).
- **D (AgCN)** matches with **(i)** "Almost neutral" (pH ≈ 7).

### Final Matching

- A → (iii) Alkaline
- B → (ii) Acidic
- C → (iv) Neutral
- D → (i) Almost neutral

### Answer

The correct matching is:
- A → (iii)
- B → (ii)
- C → (iv)
- D → (i)

Thus, the answer is option **3**.

---