Chemistry, asked by lakshya4322, 11 months ago

Chemical oxygen demand (cod) of sewage is the :

a.Oxygen required to oxidise biologically active organic mailer

b.Oxygen required to oxidise biologically inactive organic mailer

c.(a) and (b) both

d.None of the above

Answers

Answered by pratik098765432113

0

Answer:

d) none of above

Explanation:

..jnkgi

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