$A$ mixture of dichloromethane and aniline can be separated by

The fragrance of flowers is due to the presence of some steam-volatile organic compounds. These compounds are known as essential oils. At room temperature,these oils are insoluble in water but are miscible with water vapor. Name the suitable method for the extraction of these oils from flowers.

State True or False for the following statements:
$(i)$ The volatile liquid is purified by fractional distillation or simple distillation.
$(ii)$ Two liquids are separated by fractional distillation.
$(iii)$ Liquids with a small difference in boiling points are separated by fractional distillation.
$(iv)$ Liquids with a large difference in boiling points are separated by fractional distillation.

Gasoline is obtained from crude petroleum oil by its

Describe the crystallisation technique used for the purification of organic compounds.

When the difference in boiling points of two liquids is very small,the separation is carried out by: