Which one of the following statements is not – McqOptions

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1.	Which one of the following statements is not
A.	Dissolved oxygen (DO) in cold water can reach a concentration upto 10 ppm.
B.	Clean water would have a BOD value of 5 ppm.
C.	Fluoride deficiency in drinking water is harmful. Soluble fluoride is often used to bring its concentration upto 1 ppm.
D.	When the pH of rain water is higher than 6.5, it is called acid rain.
Answer» E.

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