JEE Main202226 Jul 2022Evening ShiftChemistryEnvironmental ChemistryActual
Match List I with List II List-I Pollutant List-II Source A Microorganisms I Strip mining B Plant nutrients II Domestic sewage C Toxic heavy metals III Chemical fertilizer D Sediment IV Chemical factory Choose the correct answer from the options given below
Options
- A  A - II , B - III , C - IV , D - I
- BA - II , B - I , C - IV , D - III
- CA - I , B - IV , C - II , D - III
- DA - I , B - IV , C - III , D - II
Correct answer
A.   A - II , B - III , C - IV , D - I
Step-by-step solution
Pollution of water originates from human activities. Through different paths, pollution reaches surface or ground water. water soluble inorganic chemicals that include heavy metals such as cadmium, mercury, nickel etc constitute an important class of pollutants. All these metals are dangerous to humans because our body cannot excrete them. Over the time, it crosses the tolerance limit. These metals then can damage kidneys, central nervous system, liver etc Clean water would have BOD value of less than 5 ppm whereas