Question

How many of the following is/are the correct match.
(i) Photochemical smog:
$C F _2 Cl _2$ (common component)
(ii) Ozone layer: Protects from the Sun's radiation of wavelength $255\, n m$
(iii) Methemoglobinemia: Caused by the presence of greater than $50\, p p m$ of nitrate in drinking water
(iv) Ozone layer depletion:
$(C l O)^.(g)+O(g) \rightarrow C l^{.}(g)+O_2(g)$ (one of the reaction involved)
(v) DDT: Biodegradable pollutant
(vi) Green house gas: Methane

Answer 1

(i) $CF_{2}Cl_{2}$ compound responsible for ozone depletion.
(ii) Ozone layer: Protects from the Sun's radiation of wavelength $255nm$
(iii) Drinking water with high nitrate can cause a potentially fatal disorder called methemoglobinemia. Methemoglobinemia is a condition in which more than one percent of the hemoglobin in red blood cells take the form of methemoglobin.
(iv) Ozone layer depletion:
$\left(ClO\right)^{\cdot }\left(\right.g\left.\right)+O\left(\right.g\left.\right) \rightarrow \left(Cl\right)^{\cdot }\left(\right.g\left.\right)+O_{2}\left(\right.g\left.\right)$ (one of the reaction involved)
(v) DDT: Non-Biodegradable pollutant
(vi)The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide, and ozone.