Lime water is an aqueous solution of

Options

A. `MgSO_(4)`
B. `Ca(OH)_(2)`
C. `CaCO_(3)`
D. `CaSO_(4)`

Answer

To determine what lime water is, we can follow these steps:

### Step 1: Understand the term "lime water"
Lime water is a common name used for a specific solution in chemistry. It is important to identify what this solution consists of.

**Hint:** Look for the common names and their corresponding chemical compounds.

### Step 2: Identify the chemical composition
Lime water is specifically known to be a dilute solution of calcium hydroxide. The chemical formula for calcium hydroxide is \( \text{Ca(OH)}_2 \).

**Hint:** Recall the chemical formulas of the options provided to identify the correct one.

### Step 3: Analyze the options given
The options provided in the question are:
- MgSO4 (Magnesium sulfate)
- Ca(OH)2 (Calcium hydroxide)
- CaCO3 (Calcium carbonate)
- CaSO4 (Calcium sulfate)

Among these, we need to find which one corresponds to lime water.

**Hint:** Focus on the properties of lime water and its basic nature.

### Step 4: Confirm the properties of lime water
Lime water is known to be clear, colorless, and basic in nature, with a pH of around 12.4. This aligns with the properties of calcium hydroxide, which is a strong base.

**Hint:** Consider the pH level and whether it indicates a strong base or not.

### Step 5: Conclusion
Based on the analysis, lime water is an aqueous solution of calcium hydroxide, which corresponds to option B: \( \text{Ca(OH)}_2 \).

**Final Answer:** Lime water is an aqueous solution of calcium hydroxide (\( \text{Ca(OH)}_2 \)).