**Incorrect Statement: Cooling is caused during boiling**

**Explanation:**

Boiling is a process in which a liquid rapidly changes into a vapor state when heated to its boiling point. During boiling, the liquid absorbs heat energy from its surroundings to overcome the intermolecular forces between its particles and convert into vapor. This absorption of heat energy causes the temperature of the liquid to remain constant during the boiling process.

**1. Evaporation vs Boiling:**

Evaporation and boiling are two different processes of vaporization, but both involve the conversion of a liquid into vapor.

- Evaporation: It is a surface phenomenon that occurs at any temperature below the boiling point of a liquid. It takes place only at the exposed surface of the liquid and involves the slow escape of molecules from the liquid phase into the gas phase. Evaporation leads to the cooling effect as the high-energy molecules leave the liquid surface, taking away thermal energy and reducing the average kinetic energy of the remaining liquid molecules.

- Boiling: It is a bulk phenomenon that occurs at a specific temperature known as the boiling point of a liquid. Boiling takes place throughout the liquid when the vapor pressure of the liquid equals the atmospheric pressure. Unlike evaporation, boiling occurs rapidly and results in the formation of vapor bubbles within the liquid. Boiling does not lead to a cooling effect because the liquid remains at a constant temperature during the process.

**2. Cooling during Evaporation:**

Evaporation causes cooling because the high-energy molecules with higher kinetic energy escape from the liquid surface, reducing the average kinetic energy of the remaining molecules. This reduction in kinetic energy corresponds to a decrease in temperature, resulting in a cooling effect.

**3. Cooling during Boiling:**

During boiling, the liquid absorbs heat energy from its surroundings to convert into vapor. This absorption of heat energy compensates for the cooling effect caused by the high-energy molecules leaving the liquid surface. As a result, the temperature of the liquid remains constant during boiling. Therefore, cooling does not occur during boiling.

Hence, option B is the incorrect statement.

Cooling is not caused during boiling.....So B is incorrect statement...