Boiling Point

What happens to water at 4 degree Celsius? Explain briefly in simple language.

Define the vapourisation point?

1. Water: ${100}^{\circ }C$
2. Petrol: ${210}^{\circ }C$
3. Acetone: ${56}^{\circ }C$
4. Sanitizer: ${78}^{\circ }C$

The liquids which can change into vapours easily are termed as ______ liquids.

1. Stable liquids

2. Volatile liquids
3. Unstable liquids
4. Non-volatile liquids

Hi my chemistry teacher told me that the melting point and the freezing point of water is the same is it true

The conversion of a substance from the liquid into the gaseous (vapour) phase is called __________________.

1. Solidification

2. Vaporisation

3. Sublimation

4. Diffusion

1. 273 K
2. 373 K
3. 100 K
4. 0 K

Due to which of the following reason perfumes are made up of volatile liquids?

1. Liquid droplets can rapidly convert to vapour and diffuse faster.

2. Liquid droplets can rapidly convert to gas and diffuse slowly.

3. Liquid droplets can rapidly convert to liquid and diffuse faster in air.

4. Liquid droplets can rapidly convert to liquid and diffuse slowly in air.

1. (i) and (iii)
2. (i) and (iv)
3. (ii) and (iii)
4. (ii) and (iv)

The temperature at which the substances get converted from their liquid state to gaseous state is called as _____________.

1. Freezing point

2. Boiling point

3. Melting point

4. Vaporization point

The liquids which can change into vapours easily are termed as ______ liquids.

1. Stable liquids

2. Volatile liquids
3. Unstable liquids
4. Non-volatile liquids