*/*_As per I.S. 456 - 1978, the pH value of water shall be? – McqOptions

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1.	/_As per I.S. 456 - 1978, the pH value of water shall be?
A.	Less than 6
B.	Equal to 6
C.	Not less than 6
D.	Equal to 7
Answer» D. Equal to 7

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