AP EAMCET · Chemistry · Environmental Chemistry
Identify the correct statements from the following:
i. In the presence of UV light, \(\mathrm{CF}_2 \mathrm{Cl}_2(g)\) gives chlorine free radicals which will react with \(\mathrm{O}_3(g)\) to form \(\mathrm{O}_2(g)\).
ii. Drinking water with \(10 \mathrm{ppm}\) fluoride is better than drinking water with \(1 \mathrm{ppm}\) fluoride.
iii. The maximum permissible concentration of lead in drinking water is \(50 \mathrm{ppb}\).
- A i, ii, iii
- B i, ii only
- C ii, iii only
- D i, iii only
Answer & Solution
Correct Answer
(D) i, iii only
Step-by-step Solution
Detailed explanation
Statement (i) and (iii) are correct statements whereas statement (ii) is incorrect. Its correct explanation is as follows: The drinking water with \(1 \mathrm{ppm}\) fluoride is better than \(10 \mathrm{ppm}\) fluoride. The EPA has set maximum allowable concentration of fluorine…
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