List of top Chemistry Questions on Atmospheric pollution asked in JEE Main

A. Ammonium salts produce haze in atmosphere 
B. Ozone gets produced when atmospheric oxygen reacts with chlorine radicals
C. Polychlorinated biphenyls act as cleansing solvents 
D. 'Blue baby' syndrome occurs due to the presence of excess of sulphate ions in water 
Choose the correct answer from the options given below:

Some reactions of $NO _2$ relevant to photochemical smog formation are 

photochemical smog formation

Identify $A , B , X$ and $Y$

The photochemical smog does not generally contain :

Photochemical smog consists of excessive amount of $X$, in addition to aldehydes, ketones, peroxyacetyl nitrile $(PAN)$, and so forth. $X$ is :
How can photochemical smog be controlled?