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This set of Biology Multiple Choice Questions & Answers (MCQs) focuses on Environmental Issues Set 1
Q1 | What is the effect of catalytic converter on carbon monoxide and nitrogen oxide of exhaust?
- Converts them into CO2 andH2O
- Converts them into CO2 andNitrogen gas
- Converts them into CO2 andNH4
- It converts them into CO2 andNO2
Q2 | In which year noise was also included as an air pollutant?
- 1981
- 1987
- 1986
- 1984
Q3 | Sound waves of_____ decibels causes damage to eardrum or permanently impair hearing?
- 150db or more
- 120db or more
- More than 80db
- 110db
Q4 | Which type of pollution causes altered breathing pattern, increased heartbeats and sleeplessness?
- Noise pollution
- soil pollution
- Radioactive pollution
- Thermal pollution
Q5 | According to 1990s survey which city ranked 4th among the 41 most polluted cities of the world?
- Ankleshwar
- Delhi
- Japan
- China
Q6 | Name the metropolitan city leading the country in its levels of air pollution.
- Ankleshwar
- Delhi
- Chennai
- Bangalore
Q7 | Which is the drastic change seen in Delhi public transport after 2002?
- All the buses run by CNG
- Use of unleaded petrol
- Use of LPG in buses
- All the buses run by methanol
Q8 | Which is correct according to EURO II norms?
- Sulphur can be controlled at 350ppm in diesel and 150ppm in petrol
- Sulphur can be controlled at 150ppm in petrol
- Lead can be controlled at 350ppm in diesel
- Lead can be controlled at 150ppm in petrol
Q9 | Which harmless gases are produced by smokes stakes of thermal power plant and smelters?
- N2, O2
- CO2
- CO, N2
- SO2
Q10 | For reducing vehicular pollution which measures are taken by Delhi government?
- Phasing out old vehicles
- Use of unleaded and low sulphur petrol and diesel
- Use of catalytic converter in vehicles
- All of these
Q11 | In which cities Bharat stage II is applied from 1st april’2005?
- Delhi, Mumbai, Chennai, Baroda, Surat
- Delhi, Mumbai, Kanpur, Baroda, Surat
- Delhi, Mumbai, Chennai, Baroda, Pune
- Mumbai,Pune,Bangalore,Surat,Ahmedabad
Q12 | A substantial fall in the level of which gases have been found between1997 to2005 in Delhi?
- CO2,SO2
- CO2,CO,SO2
- CO2,SO2 ,NO2
- CO2,CO,CFC
Q13 | To safeguard our water resource the amendment was passed in the year.
- 1974
- 1981
- 1986
- 1987
Q14 | Which chemical of petrol inactivates the catalysts of filter for reducing emission of poisonous gases?
- Lead
- Rhodium
- Straunsium
- Iron
Q15 | Which colloidal material is seen in domestic sewage?
- Sand and silt
- Fecal material and bacteria
- Sodium and calcium
- Phosphorus
Q16 | What happens to the O2 level and BOD of river water at sewage discharge point?
- Sharp decline in O2 level and rise in BOD
- O2 level and BOD both increases
- No change in BOD but O2 level increases
- No change in O2 level but BOD increases
Q17 | What is the reason for mortality of fish in water body?
- Biodegradation of organic matter by microbes
- Due to algal bloom
- Due to decrease in BOD
- a and b both
Q18 | Which plant is known as ‘Terror of Bengal’?
- Chara
- Wulffia
- Hydrilla
- Eichhornia
Q19 | Which is world’s most problematic aquatic weed?
- Chara
- Wulffia
- Hydrilla
- Eichhornia
Q20 | Which compound used in refrigerator is a source of chlorine
- Freon
- HFC
- BHC
- None
Q21 | What is biological magnification of DDT in large size fish eating birds?
- 25ppb
- 25ppm
- 2.5ppm
- 0.25ppm
Q22 | By which method large number of particles of pollutants are separated?
- Cyclone collector
- Porous filter
- Electrostatic precipitator
- By using solvent
Q23 | Which of the following is not responsible for pollution?
- Wood
- SO2
- Unsaturated carbon
- Solar energy
Q24 | The population of eagles and hawks is declining because of,
- Food scarcity
- game lovers
- Harmful effects of pesticides
- Very few dead animals are found in fields
Q25 | BOD of a river was found to be very low, this means the water
- Was clean
- Was polluted
- Contains algae
- Contains other dissolved minerals