Question

Choose the correct statement(s) regarding physical properties of arenes :

• A. They exist in solid or liquid state
• B. Aromatic hydrocarbons are colourless.
• C. Aromatic hydrocarbons are odourless.
• D. They are miscible with water but immiscible in non-polar solvents.

Answer 1

Answer: (A), (B)

Aromatic hydrocarbons are colourless.

Aromatic hydrocarbons are also known as arenes.
Physical properties of aromatic hydrocarbons:
Physical state:
Exists in solid or liquid state
Colour:
Aromatic hydrocarbons are colourless.
Odour :
Aromatic hydrocarbons have a characteristic aroma.They burn with a sooty flame.
Example : Naphthalene balls have unique smell and have moth repellent property. They are also used in toilets and for the preservation of clothes.
Polarity:
Generally, aromatic hydrocarbons are non-polar in nature.
Solubility:
Generally, polar substances are soluble in polar solvents and non-polar substances are soluble in non-polar solvents.
So, aromatic hydrocarbons are immiscible with water (polar) but readily miscible with non-polar solvents