Match the following correctly:
a. Carbon monoxide 1. Coal burning
b. Nitrogen oxide 2. Cigarette Smoking
c. Sulphur dioxide 3. Chemical reaction with VOCs
d. Ozone 4. Power and Industrial Plant
a b c d
This is not a very tough question. VOC can form ground-level ozone (smog) by chemical reaction, so d matches 3. Carbon monoxide(CO) is present in high levels in cigarette smoke. Rest two you can identify from the given options.
This question is a part of GKToday's Integrated IAS General Studies Module