Question

Boiling point of petrol is:
(A) Below ${{20}^{0}}C$
(B) $170-{{120}^{0}}C$
(C) $35-{{70}^{0}}C$
(D) $270-{{340}^{0}}C$

Answer 1

Hint Boiling point is the temperature required for the liquid to turn into gas. Petrol can be boiled in the lab using an electric heater by placing it in a beaker with a larger beaker containing distilled water.

Complete step by step answer:
- Petroleum may be a fuel which naturally occurs within the liquid form created by the decomposition of organic matter beneath the surface of the world many years ago.
- These fossil fuels are then refined into usable substances like petrol, kerosene etc. It is then formed by the mixture of hydrocarbons and other substances, mainly sulphur. When first collected in its natural form, it is referred to as petroleum.
- Petroleum is purified to yield useful products. Various useful materials are obtained like petrol, diesel, kerosene, grease etc.
- Petrol is additionally called as gasoline, which is a mixture of volatile, flammable liquid hydrocarbons derived from petroleum and used as fuel for internal-combustion engines.
- When petroleum is heated within the refinery, petrol gets isolated at the temperature of $35-{{70}^{0}}C$.

Therefore, the answer to the question is (C) $35-{{70}^{0}}C$.

Note: Small molecules, like petrol, have short chains. Here, the molecules do not have very strong attractive forces between them and are easily separated. This suggests that less energy is required to pull the molecules apart. Moreover, they have very low boiling points.