We have the best collection of Environmental Chemistry (Water Pollution) MCQs (Class-11) And Answers. These Environmental Chemistry (Water Pollution) MCQs (Class-11) And Answers will help you to prepare for any competitive exams like: NEET, AIIMS, JEE Mains, JEE Advance, IIT JEE, JIPMER and other Exams at all levels – you just have to practice regularly. These Environmental Chemistry (Water Pollution) MCQs (Class-11) And Answers contain most important Questions and Answers of Previous year questions papers of Medical & Engineering Entrance Tests and NCERT Books.
Water Pollution MCQs
1. What is the amount of oxygen required by bacteria to break down organic matter present in certain volume of sample of water is called?
a) Bacterial oxidation
b) Bacterial decomposition
c) Biochemical oxygen demand
d) Biological oxygen demand
Answer: Biochemical oxygen demand
2. What does the addition of phosphate fertilizers into water lead to?
a) Increased algae growth
b) Decreased algae growth
c) Increased growth of decomposers
d) Nutrient enrichment
Answer: Nutrient enrichment
3. What is the full form of PCB(in the context of chemistry)?
a) Printed Circuit Boards
b) Polychlorinated biphenyls
c) Polychemical biphenyls
d) Primary Chemical Bacteria
Answer: Polychlorinated biphenyls
4. Water should be tested for fluoride ion concentration for drinking purposes.
5. The maximum limit of which of the following in drinking water should be 50 ppb?
6. The excess of which ion in drinking water can lead to blue baby syndrome?
a) Aluminum ion
b) Copper ion
c) Sulphate ion
d) Nitrate ion
Answer: Nitrate ion
7. Plants always take in carbon dioxide and release oxygen.
8. What is an easily identified source of pollution called as?
a) Specific source
b) Point source
c) Non-point source
d) Polluting source
Answer: Point source
9. Pick out the source of organic wastes pollutant from the following.
b) Erosion of soil by agriculture and strip mining
c) Water used for cooling in factories
d) Discharge from food processing factories
Answer: Discharge from food processing factories
10. Identify the bacteria not found in human excreta that causes gastrointestinal diseases.
a) Staphylococcus aureus
b) Escherichia coli
c) Streptococcus faecalis
Answer: Staphylococcus aureus