Camphor and napthalene can be purified by1 (A) Recrystallisation (B) Fractional distillation (C)

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Camphor and napthalene can be purified by1 (A)...

Key Concepts

Fractional Distillation

Fractional distillation is a separation technique used mainly for liquid mixtures with close boiling points. It involves the repeated vaporization and condensation of the mixture in a fractionating column, thereby separating components based on their different boiling points.

Recrystallization

Recrystallization is a purification method in which a solid is dissolved in a heated solvent and then allowed to slowly crystallize as the solution cools. The process ensures that impurities remain dissolved in the solvent, thus separating them from the newly formed pure crystals.

Filtration

Filtration is a mechanical separation method used to separate insoluble solid particles from liquids or gases by passing the mixture through a porous material that retains the larger solid particles, while the fluid passes through.

Purification Techniques

In chemistry, purification techniques are methods used to isolate the desired pure compound from a mixture along with its impurities. These techniques are chosen based on the distinct physical or chemical properties of the compounds involved, such as solubility, boiling point, and sublimation behavior.

Sublimation

Sublimation is a process where a solid changes directly into a gas without passing through the liquid phase, and then re-deposits as a purified solid. This technique is especially useful for purifying substances that have a high vapor pressure and whose impurities do not sublime, allowing for an effective separation.

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