Match the pollutants given in Column I with their effects given in Column II.

Column I	Column II
(i) Phosphate fertilizers in water	(a) BOD level of water increases
(ii) Methane in air	(b) Acid rain
(iii) Synthetic detergents in water	(c) Global warming
(iv) Nitrogen oxides in air	(d) Eutrophication

–I effect ∝ Acidic strength

+I effect ∝ Basic strength

*  Most stable anion due to maximum –I effect.

*  Most acidic

with increase in separation of screen from slits plane, fringe width increases.

Excessive nitrate in drinking water causes methemoglobinemia

Excessive nitrate in drinking water causes methemoglobinemia

Release of toxic/undesirable materials in the environment.