Question

The fixed temperature at which a liquid state changes into gaseous state, due to the process of vaporisation, is called :

• A. boiling point
• B. vaporisation point
• C. either (A) or (B)
• D. none of the above

Answer 1

The correct option is C

either (A) or (B)

Explanation for correct answer: Option(C)

1. Change of the state of matter: It is a process in which a material changes from one physical state to another physical state like solid to liquid or gas to liquid etc
2. When material changes its state it either absorbs or release of heat energy.
3. Boiling or vaporisation: A process in which a liquid state changes into gaseous state after absorbing heat energy, is known as boiling or vaporisation.
4. This process of boiling or vaporistion occurs at fixed temperature, this fix value of temperature is known as boiling point or vaporisation point.

Hence, The process due to which a liquid changes into gaseous state at some fixed temperature, with the absorption of heat energy, is called: Vaporisation or boiling.