Which one of the following statement is not true ? (A) Oxides of sulphur, nitrogen and carbon ar...
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0Which one of the following statement is not true ?
(A) Oxides of sulphur, nitrogen and carbon are the most widespread air pollutant
(B) \( \mathrm{pH} \) of drinking water should be between \( 5 \cdot 5-9 \cdot 5 \)
(C) Concentration of DO below \( 6 \mathrm{ppm} \) is good for the growth of fish
(D) Clean water would have a BOD value of less than \( 5 \mathrm{ppm} \)
(AIPMT Prelim 2011)
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