Analyse the given diagram below and choose the correct option which shows the correct setup for the conventional method of purification of water.

A- Sand, B- Gravel, C- Charcoal

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A- Sand, B- Charcoal, C- Gravel

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A- Gravel, B- Charcoal, C- Sand

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A- Gravel, B- Sand, C- Charcoal

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Solution

The correct option is D
A- Gravel, B- Sand, C- Charcoal

One of the ways to purify water is sand gravel experiment. In this experiment gravel and sand are used because they have less water absorption capacity. Charcoal is used because it has more water absorption capacity and cleaning property, so, it absorbs a lot of water and purifies it. The water gets filtered through gravel and then sand after which it passes through charcoal and gets purified. The diagram below shows the correct setup for the conventional method of purification of water.

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In the traditional way of filtration we use 3 pots with charcoal at the top most pot, gravel at the second pot and sand at the third pot. but in place of charcoal and gravel if we use sand will iit be a better idea?why?

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