Pick out the wrong statement (s).
(i) Vapour pressure of a liquid is the measure of the strength of intermolecular attractive forces .
(ii) Surface tension of a liquid acts perpendicular to the surface of the liquid .
(iii) Vapour pressure of all liquids is same at their freezing points .
(iv) Liquids with stronger intermolecular attractive forces are more viscous than those with weaker intermolecular force .

Options

A. (ii) , (iii) and (iv)
B. (ii) and (iii)
C. (i) , (ii) and (iii)
D. (iii) only

Explanation

To solve the question, we need to analyze each statement one by one to determine which ones are correct and which ones are incorrect.

### Step-by-Step Solution:

1. **Statement (i): Vapour pressure of a liquid is the measure of the strength of intermolecular attractive forces.**
- **Analysis:** Vapour pressure is indeed related to the strength of intermolecular forces. A liquid with weaker intermolecular forces will have a higher vapour pressure because it can evaporate more easily. Conversely, a liquid with stronger intermolecular forces will have a lower vapour pressure. Therefore, this statement is **correct**.

2. **Statement (ii): Surface tension of a liquid acts perpendicular to the surface of the liquid.**
- **Analysis:** Surface tension is defined as the force acting per unit length on the surface of a liquid, and it acts perpendicular to the surface. This is a fundamental property of liquids. Therefore, this statement is also **correct**.

3. **Statement (iii): Vapour pressure of all liquids is the same at their freezing points.**
- **Analysis:** The freezing point of a liquid is the temperature at which its vapour pressure equals the vapour pressure of its solid phase. Different liquids have different vapour pressures at their freezing points, hence this statement is **incorrect**.

4. **Statement (iv): Liquids with stronger intermolecular attractive forces are more viscous than those with weaker intermolecular forces.**
- **Analysis:** Viscosity is the measure of a liquid's resistance to flow. Liquids with stronger intermolecular forces tend to be more viscous because the molecules are held together more tightly, making it harder for them to move past each other. Therefore, this statement is **correct**.

### Conclusion:
The only incorrect statement is **(iii)**: Vapour pressure of all liquids is the same at their freezing points.

### Final Answer:
The wrong statement is **(iii)**.

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