How many of the following is/are the correct match. (i) Photochemical smog: CF_(2)Cl_(2) (common component) (ii) Ozone layer: Protects from the Sun's radiation of wavelength 255 nm (iii) Methamoglobinemioa: Caused by the presenceof greater than 50 ppm of nitrate in drinking water (iv) Ozone layer depletion: CIO^(-)(g) + O(g) to Cl^(-)(g) + O_(2)(g) (one of the reaction involved) (v) DDT: Biodegredable pollutant (vi) Green house gas: Methane.

How many of the following is/are the correct match. (i) Photochemical

1.	How many of the following is/are the correct match. (i) Photochemical smog: CF_(2)Cl_(2) (common component) (ii) Ozone layer: Protects from the Sun's radiation of wavelength 255 nm (iii) Methamoglobinemioa: Caused by the presenceof greater than 50 ppm of nitrate in drinking water (iv) Ozone layer depletion: CIO^(-)(g) + O(g) to Cl^(-)(g) + O_(2)(g) (one of the reaction involved) (v) DDT: Biodegredable pollutant (vi) Green house gas: Methane.
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