These questions consists of two statements each, printed as Statement-I and Statement-II. While answering these Questions you are required to choose any one of the following four responses.
Statement-I: Addition of ethylene glycol(non-volatile)to water lowers the freezing point of water hence used as antifreeze.
Statement-II: Addition of any substance to water lowers its freezing point.

Answer

To analyze the given statements and arrive at a conclusion, we will break down the information provided in both statements step by step.

### Step-by-Step Solution:

1. **Understanding Statement-I**:
- The statement claims that the addition of ethylene glycol (a non-volatile solute) to water lowers the freezing point of water.
- This is true because when a non-volatile solute is added to a solvent (in this case, water), it disrupts the formation of the solid phase (ice) and thus lowers the freezing point of the solution.

2. **Understanding Freezing Point Depression**:
- The phenomenon where the freezing point of a solvent is lowered by the addition of a solute is known as freezing point depression.
- The extent of freezing point depression can be calculated using the formula:
\[ \Delta T_f = i \cdot K_f \cdot m \]
where:
- \(\Delta T_f\) = change in freezing point
- \(i\) = van 't Hoff factor (which is 1 for ethylene glycol)
- \(K_f\) = freezing point depression constant for the solvent (water)
- \(m\) = molality of the solution

3. **Conclusion for Statement-I**:
- Since ethylene glycol is a non-volatile solute and its addition lowers the freezing point of water, Statement-I is **correct**.

4. **Understanding Statement-II**:
- The statement claims that the addition of any substance to water lowers its freezing point.
- This is **incorrect** because not all substances will lower the freezing point. Only non-volatile solutes (like ethylene glycol) will cause freezing point depression. Volatile solutes or certain types of solutes may not have this effect.

5. **Conclusion for Statement-II**:
- Since the statement implies that any substance (including volatile solutes) will lower the freezing point, it is **incorrect**.

### Final Answer:
- **Statement-I is correct** and **Statement-II is incorrect**.