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

The industrial activity held least responsible for global warming is :

Match List I with List II.

List I Pollutant	List II Disease/ sickness
A. Sulphate (> 500 ppm)	I. Methemoglobinemia
B. Nitrate (> 50 ppm)	II. Brown mottling of teeth
C. Lead (> 50 ppb)	III. Laxative effect
D. Fluoride (> 2ppm)	IV. Kidney damage

Choose the coned answer from the options given below:

The primary pollutant that leads to photochemical smog is :