Environment Quiz 12

1. Biofilters provide waste treatment by removing uneaten fish feed. 
2. Biofilters convert ammonia present in fish waste to nitrate. 
3. Biofilters increase phosphorus as nutrient for fish in water. 

How many of the statements given above are correct?

1. Gold mining activity is a source of mercury pollution in the world. 
2. Coal-based thermal power plants cause mercury pollution. 
3. There is no known safe level of exposure to mercury. 

How many of the above statements are correct?

1. Carbon monoxide 
2. Nitrogen oxide 
3. Ozone 
4. Sulphur dioxide 

Excess of which of the above in the environment is/are the cause(s) of acid rain?

1. The 24-hour mean of PM2.5 should not exceed 15 µg/m³ and annual mean of PM2.5 should not exceed 5 µg/m³. 
2. In a year, the highest levels of ozone pollution occur during the periods of inclement weather. 
3. PM10 can penetrate the lung barrier and enter the bloodstream. 
4. Excessive ozone in the air can trigger asthma. 

Which of the statements given above are correct?

1. Other than those made by humans, nanoparticles do not exist in nature. 
2. Nanoparticles of some metallic oxides are used in the manufacture of some cosmetics. 
3. Nanoparticles of some commercial products which enter the environment are unsafe for humans. 

Which of the statements given above is/are correct?

(1) Brakes of motor vehicles 

(2) Engines of motor vehicles 

(3) Microwave stoves within homes 

(4) Power plants 

(5) Telephone lines 

Select the correct answer using the code given below.

(1) They may release lethal quantities of carbon monoxide into the environment. 

(2) The copper slag can cause the leaching of some heavy metals into the environment. 

(3) They may release sulphur dioxide as a pollutant. 

Select the correct answer using the code given below.

(1) It is a product of oil refineries. 

(2) Some industries use it to generate power. 

(3) Its use causes sulphur emissions into the environment. 

Which of the statements given above are correct?

1. Automobile exhaust 
2. Tobacco smoke 
3. Wood burning 
4. Using varnished wooden furniture 
5. Using products made of polyurethane 

Select the correct answer using the code given below: