Which of the following statements about photochemical smog is wrong? 

(i) It has a high concentration of oxidizing agents. 

(ii) It has a low concentration of oxidizing agents. 

(iii) It can be controlled by controlling the release of NO₂ , hydrocarbons, ozone etc. 

(iv) Plantation of some plants like Pinus helps in controlling photochemical smog.

–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.