The salt which will give an acidic solution on dissolving in water is

Options

A. sodium sulphate
B. ammonium sulphate
C. sodium carbonate
D. sodium chloride

Answer

To determine which salt will give an acidic solution when dissolved in water, we need to analyze the properties of the salts provided in the options. Here’s a step-by-step solution:

### Step 1: Understand the Concept of Acidic Salts
Acidic salts are formed from the reaction of a strong acid and a weak base. When these salts dissolve in water, they release hydrogen ions (H+), resulting in an acidic solution.

### Step 2: Analyze Each Option
We will look at the options given and determine whether they are acidic, basic, or neutral salts.

#### Option 1: Sodium Sulfate (Na2SO4)
- Sodium sulfate is formed from sulfuric acid (H2SO4), a strong acid, and sodium hydroxide (NaOH), a strong base.
- Since both the acid and base are strong, the resulting salt is neutral.
- **Conclusion**: Na2SO4 does not produce an acidic solution.

#### Option 2: Ammonium Sulfate ((NH4)2SO4)
- Ammonium sulfate is formed from sulfuric acid (H2SO4), a strong acid, and ammonium hydroxide (NH4OH), a weak base.
- The presence of the weak base (NH4OH) and the strong acid (H2SO4) means that this salt will produce an acidic solution upon dissolving in water.
- **Conclusion**: (NH4)2SO4 produces an acidic solution.

#### Option 3: Sodium Carbonate (Na2CO3)
- Sodium carbonate is formed from carbonic acid (H2CO3), a weak acid, and sodium hydroxide (NaOH), a strong base.
- Since the base is strong and the acid is weak, the resulting solution will be basic.
- **Conclusion**: Na2CO3 does not produce an acidic solution.

#### Option 4: Sodium Chloride (NaCl)
- Sodium chloride is formed from hydrochloric acid (HCl), a strong acid, and sodium hydroxide (NaOH), a strong base.
- Both the acid and base are strong, resulting in a neutral salt.
- **Conclusion**: NaCl does not produce an acidic solution.

### Step 3: Final Conclusion
From the analysis of all the options, the only salt that will give an acidic solution when dissolved in water is **Ammonium Sulfate ((NH4)2SO4)**.

### Answer:
The salt which will give an acidic solution on dissolving in water is **Ammonium Sulfate ((NH4)2SO4)**.

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