Give Reasons.
1. Alum is used in the process of sedimentation.
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Answer:
Alum increases the rate of sedimentation because,alum being an external agent causes the particles present in the container to colloid together and form heavier particles, as heavier particles sink in water these particles settle down therefore,increasing the speed of sedimentation
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Explanation:
By using alum in the water, the rate of sedimentation can be increased. This process is called 'Loading'. Here all the insoluble solid particles of the mixture get accumulated on alum leading to the separation of solid from insoluble solid particles.
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