Test: Separation of Mixtures - JAMB MCQ

Filtration is the process of separating suspended solid matter from a liquid by passing it through the pores of a membrane known as a filter. For example, tea leaves are separated from tea by filtration.

Handpicking is a technique that separates undesirable substances such as small pieces from wheat, rice, and pulses. Stone fragments from grains are picked up by hand and discarded.

A large amount of seawater is stored in a sand dig with a large surface area and allowed to evaporate by absorbing solar energy. The water evaporates, but the sea salts remain in the dig.

Distillation is the process of separating a liquid from a mixture through evaporation and condensation.

Condensation occurs in one of two ways: The air is either cooled to its dew point or becomes so saturated with water vapour that it cannot hold any more water.

The sieving method is used to separate solid constituents of a mixture that vary in size.

We can separate camphor from sand by slowly heating the mixture. The camphor vapours are then collected and cooled. The solid camphor will crystallise. This is also known as sublimation.

The physical transformation of a liquid, solution, or gas to a crystal, which is solid with an ordered internal arrangement of molecules, ions, or atoms, is known as crystallisation.

This method is used to separate the husk from heavy grain seeds.

Churning is the process of continuously moving milk or curd with skimmers to produce butter.

Yes, decantation is the process of transferring the clear liquid without disturbing the sediments.

 Threshing is the separation of grain from the stalk on which it grows as well as the chaff or unit that covers it. The edible portion of the crop is loosened during the process, but not the fibre portion.

Sedimentation is the process of separating insoluble substances that are heavier than liquid by allowing them to settle naturally due to gravity. The clear upper liquid is poured out of the container without disturbing the sediment during decantation.

Both iron and copper are metals, but iron can be attracted by magnets, and copper cannot. Hence, they can be separated by magnetic separation.

The mixture of liquid and insoluble solid is placed in a container during sedimentation. Gravity causes the heavier solid particles to settle at the bottom of the container. These solid particles are referred to as sediment.

Chalk powder does not dissolve in water and cannot pass through filter paper. Thus, the mixture can easily be separated by the filtration process.

The process of separating cotton fibres from cotton seeds or lint is known as ginning. It also helps to remove impurities like dust, small stones, and wood particles.

Sand and salt are mixed with water, the salt dissolves in the water, and the sand can be separated by sedimentation, decantation, and filtration. The salt can then be separated using evaporation.

Evaporation takes place when liquids are heated, and then they get converted into vapours.