NTSE Chemistry Pollution MCQs

Question: DDT is -

• a) an antibiotic
• b) a fertilizer
• c) a non-degradable pollutant
• d) dihlorodifluoro titanium

Answer: a non-degradable pollutant

Question: Lung disease are four times more in urban areas thean rural areas. This is due to the presence of-

• a) SO2   
• b) CO2   
• c) N2
• d) Water vapour

Answer: SO2   

Question: Which one is not correct ? Greenhouse effect :

• a) is due to high concentration of CO2 in atmosphere.
• b) is influenced by gases such as CH4, O3 and chlorofluorocarbons.           
• c) would result in the warming up of the earth.
• d) would result in lowering the level of oceans due to high evaporation.

Answer: would result in lowering the level of oceans due to high evaporation.

Question: Which of the following is produced by reaction of ultraviolet light ?

• a) CO
• b) SO2 
• c) O3 
• d) NO2

Answer: O3 

Question: Which air pollutant is not released by scooters and cars ?

• a) SO2  
• b) Flyash
• c) Hydrocarbons
• d) CO

Answer: Flyash

Question: Fluorosis, a bone disease, in caused by the presence of -

• a) Pesticides in water.
• b) Fluorides in water.
• c) Carbon monoxide in air.
• d) Sulphur dioxide in air.

Answer: Fluorides in water.

Question: In there was no carbon dioxide in earth’s atmosphere, the temperature of the earth’s surface would be -

• a) Same as present
• b) Less than the present.
• c) More than the present.
• d) Dependent on the amount of oxygen in the atmosphere.

Answer: Less than the present.

Question: Ozone hole refers to -

• a) Increased concentration of ozone.
• b) Reduction in the thickness of ozone layer in the troposphere.
• c) Reduction the thickness of ozone layer in the stratosphere.
• d) Hole in the ozone layer.

Answer: Reduction the thickness of ozone layer in the stratosphere.

Question: Gas released during Bhopal tragedy was -

• a) Sodium isothiocynate
• b) Ethyl isothiocyanate
• c) Potassium isothiocyanate
• d) Methyl isocyanate

Answer: Methyl isocyanate

Question: Pollutant is a chemical substance or factor which disturbs -

• a) Our balanced environment.
• b) Geochemical cycles.
• c) Flora of any region
• d) Fauna of any region.

Answer: Our balanced environment.

More Questions...................

Question: Distilled water is -

• a) Pure water
• b) Packaged drinking water.
• c) Rain water.
• d) Sea water

Answer: Pure water

Question: The gas which is responsible for damaging Taj Mahal is -

• a) NO2 
• b) SO2   
• c) CO
• d) None

Answer: SO2   

Question: CFC (Chloro fluorocarbon) are responsible for -

• a) Depletion of Ozone layer
• b) Green house effect.
• c) Both (A) and (B)
• d) Acid rain.

Answer: Both (A) and (B)

Question: The acid rain does not contain -

• a) Sulphuric acid
• b) Acetic acid
• c) Nitric acid
• d) All the above

Answer: Acetic acid

Question: Useful application of green house effect is -

• a) Growing vegetables and flower is snow bound regions.
• b) Submergence of coastal regions and island.
• c) Both A and B
• d) None of these above.

Answer: Growing vegetables and flower is snow bound regions.