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QNEET-2013-Ch-1561: NEET 2013 Chemistry - Class 12 NEET-2013-Ch-1561 Solution: Which one of the following statements is not true? Clean water…
Which one of the following statements is not true? Clean water would have a BOD value of 5 ppm. Fluoride deficiency in drinking water is harmful. Soluble fluoride is often used to bring its concentration upto 1 ppm. When the pH of rain water is higher than 6.5 it is called acid rain. Dissolved Oxygen (DO) in cold water can reach a concentration upto 10 ppm.
Multiple Choice Options
- A Clean water would have a BOD value of 5 ppm.
- B Fluoride deficiency in drinking water is harmful. Soluble fluoride is often used to bring its concentration upto 1 ppm.
- C When the pH of rain water is higher than 6.5, it is called acid rain.
- D Dissolved Oxygen (DO) in cold water can reach a concentration upto 10 ppm.
Step-by-Step Verified Solution
Acid rain is the rain water containing
sulphuric acid and nitric acid which are formed
from the oxides of sulphur and nitrogen present
in the air as pollutants and rain water has a pH
range of 4-5.