Pollutants are the substances which present in the environment in greater proportion than its natural abundance and resulting in harmful or deterimental effect on the quality of environment. Generally highly toxic substances are considered . Generally highly toxic even substances that are normally considered harmless can cause pollution if they are present in underirable concentration. Over exploitation of natural resourses uncontrolled mechanisation deforestation and extensive use of chemical fertilizers and pesticides have brought about many changes in different component of the environment . Which one of the air pollutant is most toxic?A. `NO_(2)`B. `SO_(2)`C. `CO_(2)`D. CO

Pollutants are the substances which present in the environment in grea

1.	Pollutants are the substances which present in the environment in greater proportion than its natural abundance and resulting in harmful or deterimental effect on the quality of environment. Generally highly toxic substances are considered . Generally highly toxic even substances that are normally considered harmless can cause pollution if they are present in underirable concentration. Over exploitation of natural resourses uncontrolled mechanisation deforestation and extensive use of chemical fertilizers and pesticides have brought about many changes in different component of the environment . Which one of the air pollutant is most toxic?A. `NO_(2)`B. `SO_(2)`C. `CO_(2)`D. CO
Answer» Correct Answer - D

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A sample of air turns lime water milky and also turns acidified potassium dichromate green in aqueous solution has low `pH`. This is due to the presence of pollutantsA. `CO_(2)`B. `SO_(2)`C. Both (a) and (b)D. None of these
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