Pollutants and Their Classification

Q. Tetrachloroethane which was earlier used as solvent for dry cleaning, has been replaced by

1. Alum
2. Chlorine gas
3. Ethanal
4. Liquid $C{O}_2$

Q. Which of the following is a secondary pollutant?

1. $C{O}_2$
2. $N_{2}O$
3. $S{O}_2$
   
4. $PAN$

Q. Which of the following is a sink for $CO$?

1. Oceans
2. Plants
3. Haemoglobin
4. Micro-organisms present in the soil

Q. The non-viable particulate among the following is:

1. dust
2. bacteria
3. moulds
4. fungi

Q. Assertion
If BOD level of water in reservoir is less than 5 ppm it is not polluted.

Reason
High biological oxygen demand means low activity of bacteria in water.

1. Assertion is correct but Reason is incorrect
2. Both Assertion and Reason are incorrect
3. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
4. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Q. Which of the following is not the example of non-degradable pollutants?

1. Waste Organic Matter
2. DDT
3. Plastics
4. Heavy metals

Q. Which of the following is an example of particulate pollutants?

1. Oxides of sulphur
2. Oxides of carbon
3. Oxides of nitrogen
4. None of the above

Q. The viable particulate among the following is:

1. fumes
2. algae
3. smoke
4. mist

Q. When pollutants in the air mix up in a chemical reaction, they form an even more dangerous chemical.these pollutants are called ______.

1. primary air pollutant
2. secondary air pollutant
3. tertiary air pollutant
4. none of above

Q. Pollution is:

1. removal of top soil
2. conservation of energy
3. release of toxic/undesirable materials in environment
4. all of the above