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Frequently Asked Questions in Environmental Sciences


1. Biogas produced by anaerobic bacterial activity is a mixture of

(A) CH3OH, CO2, NH3 and H2O

(B) CH4, CO2, NH3, H2S and H2O

(C) H2S, CO2, CO, CH4 and LPG

(D) CO2, SO2, NO2, CH4 and H2O

2. At present, what is the share of renewable energy in the total energy production of India ?

(A) ~ 11 – 12%

(B) ~ 2 – 3%

(C) ~ 20%

(D) ~ 25 – 30%

3. If all of the atmosphere were at standard temperature and pressure, then present day CO2 concentration of 392 ppm would correspond to how much carbon in the atmosphere ?

(A) ~ 415 Gt

(B) ~ 831 Gt

(C) ~ 1245 Gt

(D) ~ 1620 Gt

4. Risk assessment is different from Environmental Impact Assessment in terms of

(A) Hazard identification

(B) Disaster management

(C) Probability expression

(D) Consideration of human environment

5. Reliable, quantitative and verifiable data used in Environmental Impact Assessment study are called

(A) Hard data

(B) Soft data

(C) Continuous data

(D) Discrete data

6. Which category of projects do not require Environmental Impact Assessment in accordance with the 

Indian EIA Notification 2006 ?

(A) Category A

(B) Category B1

(C) Category B2

(D) None of the above

7. Environmental Protection Act was enacted in India during

(A) 1986

(B) 1984

(C) 1994

(D) 1987

8. Minimum Stock height of incinerators should be

(A) 10 m

(B) 15 m

(C) 30 m

(D) 60 m

9. Basal convention on transboundary movement of hazardous waste was implemented in the year

(A) 1969

(B) 1979

(C) 1989

(D) 1999

10. The events A and B are mutually exclusive. If P(A) = 0.5 and P(B) = 0.2, then what is P(A & B) ?

(A) 0.5

(B) 0.1

(C) 0.7

(D) 0.3

11. A population, from where samples are drawn, is called

(A) Total population

(B) Target population

(C) Accessible population

(D) Universal population

12. The rate of variation of population (N) with time (t) represented by equation dN dt = γ N, follows

(A) J-shaped curve

(B) S-shaped curve

(C) Z-shaped curve

(D) Parabolic curve

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