What happens during the aeration step of water treatment?

Amount of oxygen decreases

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Amount of oxygen increases

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Amount of chlorine decreases

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Amount of chlorine increases

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Solution

The correct option is B
Amount of oxygen increases

The amount of oxygen is increased in water during the aeration step of water treatment. Chlorine is added after aeration to sterilize the filtered and aerated water. This process is known as chlorination.

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The amount of oxygen dissolved in water increases due to increased water pollution.

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