AP EAMCET Engineering 23 Apr 2019 Shift 1 Paper

Identify the correct statements from the following:
i. In the presence of UV light. CF2Cl2 (g) gives chlorine free radicals which will react with O3 (g) to form O2 (g)
ii. Drinking water with 10 ppm fluoride is better than chinking water with 1 ppm fluoride
iii. The maximum permissible concentration of lead in drinking water is 50 ppb