Presence of carbonaceous matter in the sewage Options: A . &nbspCauses reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures B . &nbspReduces sulphate ions to sulphides causing obnoxious smell C . &nbspIncreases the quantity of chlorine used for its purification D . &nbspAll of the above

Presence of carbonaceous matter in the sewage

Question

Presence of carbonaceous matter in the sewage

Options:

A . Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures

B . Reduces sulphate ions to sulphides causing obnoxious smell

C . Increases the quantity of chlorine used for its purification

D . All of the above

Answer: Option D

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