Name the process by which the various ‘dyes’ (coloured materials) present in black ink can be separated.

Name the process which can be used to purify an impure sample of copper sulphate.

Name the process by which all the dye can be recovered from black ink.

Which technique is used in a washing machine to squeeze out water from wet clothes while drying?

Which technique can be used to detect and identify traces of poison present in the stomach wash of a person?