Biology Multiple Choice Questions and Answers for Different Competitive Exams

Multiple Choice Questions on Environmental Issues

Algal bloom
1.  The major pollutant from automoblie exhaust is  
a) NO
b) CO
c) SO2
d) Soot

2. The  green house gases, otherwise called radioactively active gases includes
a) Carbon dioxide
b) CH4
c) N2O
d) All of these

3. Algal bloom results in

a) Global warming
b) Salination
c) Eutrophication
d) Biomagnification

4. A high  Biological Oxygen Demand (BOD) indicates that:
a)  water is pure
b) absence of microbial action
c) Low level of microbial pollution
d) High   level of microbial pollution

5. The effects of radioactive pollutants depends upon
a) Rate of diffusion
b) energy releasing capacity
c)  rate of deposition of the contaminant
d) all of these

6.  The range of normal human hearing is in the range of
a) 10 Hz to 80 Hz
b) 50 Hz to 80 Hz
c) 50Hz to 15000 Hz
d) 15000 Hz and above

7.  The pollution which does not persistent harm to life supporting system is
a) Noise pollution
b) Radiation pollution
c) Organochlorine pollution
d) All of these

8. Soap and detergents are the source of organic pollutants like:
a) glycerol
b) polyphosphates
c)  sulphonated hydrocarbons
d) all of these

9. Growing agricultural crops between rows of planted trees is known as
a) Social forestry
b) Jhum
c) Taungya system
d) Agroforestry

10. The main atmospheric layer near the surface of earth is
a) troposphere
b) mesophere
c) ionosphere
d) stratospere

Learn more:
1. b) CO
2. d) All of these
3. c) Eutrophication
4. d) High   level of microbial pollution
5. d) all of these
6. c) 50Hz to 15000 Hz
7. a) Noise pollution
8. d) all of these
9. c) Taungya system
10. a) troposphere

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