1.  Which of the following organic compounds is not of biogenic origin?

a

  Isoprene

b

 a-pinene

c

 Myrcene

d

 Acrolein

Answer & Explanation
Answer : Option D

2.  Which is a correct food chain in the Antarctic ecosystem?

a

  Phytoplankton - Krill - Carnivorous Plankton - Emperor Penguin

b

 Phytoplankton - Krill - Carnivorous Plankton - Squid - Elephant Seal - Leopard Seal

c

 Herbivorous Zoo Plankton - Phytoplankton - Carnivorous Plankton - Elephant Seal - Leopard Seal

d

 Phytoplankton - Herbivorous Zoo Plankton - Carnivorous Plankton - Adelic Penguin - Emperor Penguin

Answer & Explanation
Answer : Option B

3.  According to WHO, maximum permissible level of chlorides in drinking water is

a

  100 mg/L

b

 200 mg/L

c

 600 mg/L

d

 800 mg/L

Answer & Explanation
Answer : Option C

4.  Which one of the following is not an energy recovery method of solid waste management?

a

  Pelletisation

b

 Biomethanation

c

 Pyrolysis

d

 Composting

Answer & Explanation
Answer : Option D

5.  Reserve food material in algae is

a

  Starch

b

 Protein

c

 Cellulose

d

 None of the above

Answer & Explanation
Answer : Option A

6.  The biodegradability of xenobiotics can be characterized by

a

  Rate of CO2formation

b

 Ratio of BOD to COD

c

 Rate of O2consumption

d

 All of the above

Answer & Explanation
Answer : Option D

7.  Baba Amte was the leader of

a

  Appiko Movement

b

 Chipko Movement

c

 Narmada Bachao Andolan

d

 Tehri Dam Movement

Answer & Explanation
Answer : Option C

8.  Average composition of biodegradable waste in Municipal Solid Waste (MSW) of India is

a

  55 - 65 %

b

 40 - 45 %

c

 30 - 35 %

d

 60 - 70 %

Answer & Explanation
Answer : Option B

9.  As a consequence of succession the P/B ratio (Gross production / Standing crop biomass) is changed. It is

a

  High during developmental stages and low at mature stage.

b

 Remaining unchanged at all stages.

c

 > 1 or < 1 at developmental stages and approximately 1 at mature stage.

d

 Low during developmental stages and high at mature stage.

Answer & Explanation
Answer : Option A

10.  Which one of the following pesticides persists for a long period in soil?

a

  Lindane

b

 Parathion

c

 Carbaryl

d

 Monocrotophos

Answer & Explanation
Answer : Option A

11.  Which of the following statements is correct in the context of Environmental Impact Assessment?

a

  The process considers broad range of potential alternatives.

b

 It provides early warning of cumulative effects.

c

 Focuses on sustainability agenda.

d

 Focuses on standard agenda.

Answer & Explanation
Answer : Option D

12.  Which of the following disinfection method does not result in synthesis of organochlorine?

a

  Chlorination

b

 Ozonation

c

 Chloroamination

d

 None of the above

Answer & Explanation
Answer : Option B

13.  Which of the following ecosystems has the lowest net primary production per square metre?

a

  A tropical rain forest

b

 A grassland

c

 An open ocean

d

 A coral reef

Answer & Explanation
Answer : Option C

14.  pH of 0.01 M HNO3 is

a

  0.1

b

 1

c

 2

d

 10

Answer & Explanation
Answer : Option C

15.  Which of the following is not a characteristic feature of community?

a

  Populations of different species occupying a particular place.

b

 Groups of interacting individuals of different species.

c

 Different species interacting with one another and with their environment of matter and energy.

d

 Complex interacting network of plants, animals and microbes.

Answer & Explanation
Answer : Option C

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