Q76 of 252 Page 107

The material which is added to water during purification process at the water works so as to disinfect it is :

Process of adding chlorine (Cl) or hypochlorite to water ensures the killing of germs. This method is used to kill certain bacteria and other microbes in tap water as chlorine is highly toxic.

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The dyes present in fountain pen ink can be separated by the technique of :

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Pure copper sulphate can be obtained form an impure sample by the process of :

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The technique which is used to separate particles of a solid suspended in a liquid quickly is called:

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Naphthalene can be separated for sand: