A water sample has ppm level concentration of following anions, ${\mathrm{F}}^{-}=10;\mathrm{S}{\mathrm{O}}_4^{2-}=100;\mathrm{N}{\mathrm{O}}_3^{-}=50$ . The anion/anions that make/makes the water sample unsuitable for drinking is/are

How many of the following pollutants are considered as non-viable particulate pollutants?

Smoke, dust, fungi, mists, moulds, algae, smog, bacteria, fumes

How many of the following is/are the correct match.

(i) Photochemical smog:

${\mathrm{CF}}_2{\mathrm{Cl}}_2$ (common component )

(ii) Ozone layer: Protects from the Sun's radiation of wavelength $255 \mathrm{nm}$

(iii) Methemoglobinemia : Caused by the presence of greater than $50 \mathrm{ppm}$ of nitrate in drinking water

(iv) Ozone layer depletion:

${\mathrm{ClO}}^{·}\left(\mathrm{g}\right)+\mathrm{O}\left(\mathrm{g}\right)\to {\mathrm{Cl}}^{·}\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)$ (one of the reaction involved)

(v) DDT: Biodegradable pollutant

(vi) Green house gas: Methane

How many of the following compounds can be categorized as primary air pollutants?

${\text{SO}}_3, {\text{H}}_2{\text{O}}_2, {\text{NO}}_2, {\text{H}}_2{\text{SO}}_4, {\text{N}}_2\text{O}, \text{CO}, {\text{SO}}_2, {\text{HNO}}_3{\text{, CO}}_2, \text{NO}$

The number of greenhouse gases in the following is ____.
${\mathrm{CO}}_2, {\mathrm{O}}_2, {\mathrm{N}}_2\mathrm{O}, {\mathrm{CH}}_4, \mathrm{CFCs}, \mathrm{CO}, {\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)$, ${\mathrm{O}}_3$

Report your answer to the nearest integer.