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

Question

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, A - II , B - III , C - IV , D - I, A - II , B - I , C - IV , D - III, A - I , B - IV , C - II , D - III, A - I , B - IV , C - III , D - II

MARKS App · Accepted Answer

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 highly polluted water could have a value of 17 ppm or more List-I Pollutant List-II Source A Microorganisms II Domestic sewage B Plant nutrients III Chemical fertilizer C Toxic heavy metals IV Industries and chemical factories D Sediment I Erosion of soil by agriculture and strip mining

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	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

	List-I Pollutant		List-II Source
A	Microorganisms	II	Domestic sewage
B	Plant nutrients	III	Chemical fertilizer
C	Toxic heavy metals	IV	Industries and chemical factories
D	Sediment	I	Erosion of soil by agriculture and strip mining