Question

Name the method used to separate the components of a mixture of naphthalene and common salt

Answer 1

Sublimation

• It is a process of conversion of a solid substance directly into a gaseous state without changing into a liquid state.
• Naphthalene is a sublimable substance whereas common salt is a non-sublimable substance

Steps:

• Take a mixture of naphthalene and common salt in a china dish.
• Cover the china dish using an inverted funnel whose stem is closed with cotton.
• Heat the mixture.
• Naphthalene that sublimes on heating is collected on the cooler side of the funnel.
• The common salt is left behind in the china dish.

Therefore, sublimation can be used to separate components of a mixture of naphthalene and common salt.