Arrange the given water treatment processes in sequential order.

1. Screening 2. Sedimentation 3. Chlorination 4. Filtration

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1. Screening 2. Filtration 3. Chlorination 4. Sedimentation

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1. Chlorination 2. Filtration 3. Screening 4. Sedimentation

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1. Sedimentation 2. Filtration 3. Screening 4. Chlorination

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Solution

The correct option is A 1. Screening 2. Sedimentation 3. Chlorination 4. Filtration
$∙$ Screening is the first stage in the water treatment process. By screening, we remove bigger chunks of wastes right at the beginning of the treatment.
$∙$ In sedimentation, the impurities settle down because they are heavier.
$∙$ Chlorination is a process of passing chlorine gas through dirty water to kill germs.
$∙$ In the filtration process, the water is filtered through sand.

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