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You have tried a number of methods to separate impurities like mud from water. Sometimes, the water obtained after employing all these processes could still be a little muddy. Let us see if we can remove even this impurity completely.
- Take this filtered water in a glass.
- Tie a thread to a small piece of alum.
- Suspend the piece of alum in the water and swirl.
Did the water become clear? What happened to the mud?
. The after some time. This process is called .
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