Test: Methods of Separation in Everyday Life - Class 6 MCQ

Handpicking is a technique where you manually remove unwanted substances from a mixture based on differences in size, color, or shape. For example, you can use handpicking to remove small stones or husk from grains like wheat or rice. This method works well when the unwanted particles are few and can be easily picked out by hand.

Threshing is the process of separating the grains from the harvested stalks by beating them. Farmers use this method to collect the grains from plants like wheat or rice. Threshing can be done manually or with machines, making the process faster and more efficient.

Winnowing uses wind or blowing air to separate lighter particles, like husk, from heavier particles, such as grains. The wind blows away the lighter husk, while the heavier grains fall to the ground. This method is commonly used by farmers to separate the husk from grains like wheat or rice.

Sieving is a technique where a sieve is used to separate particles of different sizes. The fine particles pass through the holes in the sieve, while the larger particles remain behind. This method is commonly used to separate things like bran from wheat flour.

Evaporation is used to obtain salt from seawater. The seawater is placed in shallow pits and exposed to sunlight, allowing the water to evaporate. As the water disappears, the solid salt is left behind and can be collected.

Sedimentation is the process where heavier, insoluble particles settle at the bottom of a liquid. This happens when the mixture is left undisturbed, allowing the heavier particles to naturally sink, while the liquid remains on top.

Filtration is the technique used to separate insoluble solids from a liquid by pouring the mixture through a filter. The filter traps the solid particles, while the liquid passes through, resulting in a clear liquid. This method is commonly used to separate tea leaves from tea or to filter muddy water.

Churning involves agitating a liquid mixture to separate lighter components from heavier ones. For example, churning curd separates butter (the lighter component) from buttermilk (the heavier liquid).

Magnetic separation uses magnets to isolate magnetic substances from non-magnetic ones. For example, iron nails can be separated from sawdust using a magnet. This technique is commonly used in industries to separate scrap iron from waste materials.

Decantation is commonly used in daily life to separate heavier particles, like mud, from liquid. For example, when muddy water is left undisturbed, the mud settles at the bottom, and the clean water can be poured off.