Question

Pure aniline is a:
A. Brown coloured liquid
B. Colourless solid
C. Colourless liquid
D. Brown coloured solid

Answer 1

Hint: Aniline acts as an organic base. It is useful for many purposes such as the manufacture of dyes, plastics, explosives, drugs, rubber, etc. Aniline is from the group of phenylamine or aminobenzene. They are toxic substances and also called aromatic amines.

Complete Step by Step Solution:
Let’s understand the properties of aniline in detail. The occurrence of aniline in nature is in the form of a brownish and yellowish oily liquid. It possesses a fishy and musty smell. Also, it smells like a rotten fish. It is a chemical species that is flammable in nature. And its odour is very unpleasant. The solubility of aniline in water is positive, which means, aniline is water soluble. Chemically, the aniline is represented as\[{{\rm{C}}_{\rm{6}}}{{\rm{H}}_{\rm{5}}}{\rm{NH}}\] . It is called an organic compound because it contains Hydrogen, Nitrogen and oxygen atoms.

Therefore, pure aniline is a brown-coloured liquid. Hence, the option A is right.

Additional Information:

Some of the physical properties of aniline are:

1) Aniline shows slight solubility in water and also many times, it is freely soluble in ether and alcohol.
2) Aniline turns dark in colour on exposure to air and light
3) It reacts with strong acids to form anilinium ion that is, \[{{\rm{C}}_{\rm{6}}}{{\rm{H}}_{\rm{5}}}{{\rm{N}}_{\rm{3}}}^{\rm{ + }}\] .

Note: There are many uses of aniline in everyday life. In the production of clothes like jeans, it is used as a dyeing agent. It is also used in the manufacture of drugs, such as paracetamol, Tylenol, etc. In the field of agriculture, it is used in the making of fungicides and pesticides.