Food for thought - UPSC (IAS) prelims special

These questions are based on class 12 biology book chapter 16

1. Identify the correct statements

a. Catalytic convertor is used in industries to treat effluent gases of the dust particles

b. Electrostatic separator is used to clean exhaust gases from automobiles

2. Lead is added to petrol

a. To make petrol more efficient

b. To increase the mileage of petrol

c. To protect the engine from damage

d. To reduce of pollutants in exhaust gases

3. Which of the following are air pollutants

a. Exhaust gases from industries

b. Exhaust gases from automobiles

c. Noise

4. Which of the following measure reduce air pollution

a. Use of CNG instead of diesel or petrol in vehicles

b. Usage of low ‘S’ content fuel

c. Use of catalytic converters

5. If there is lot of organic matter (sewage) in water then

a. Its BOD is low

b. Dissolved oxygen in such water will be very high

6. Identify the correct statements

a. Kyoto protocol envisages control of green house gases

b. Montreal protocol envisages control of ozone

7. Identify the correct statements

a. Biomagnification refers to increase in concentration of the toxic substance in successive trophic levels

b. Bioaccumulation refers to the accumulation of toxic substances, such as pesticides, or other organic chemicals in an organism (i.e in one trophic level)

c. Bioconcentration is a related but more specific term, referring to uptake and accumulation of a substance from water alone unlike bioaccumulation which involves uptake from water, air, soil etc