Give reason: A drop of ink added to water in a glass turns the whole water blue.

Name the term for the following:

The change of a solid into a liquid.

Name the term for the following:

The force of attraction between the molecules of matter.

Name the term for the following:

The particles of matter which may or may not have an independent existence

Name the term for the following:

The process due to which a solid directly changes into its vapour.