Environmental Science and Ecology - Mock Test 24

Question 231

DDT is a ?

A) Green house gas B) Non-degradable pollutant C) Degradable pollutant D) None of these

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Question 232

Ultraviolet radiation from sunlight causes the reaction that produces ?

A) Fluorides B) Ozone C) Carbon monoxide D) Sulphur dioxide

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Question 233

Contamination of water with sewage is indicated by cysts of ?

A) Escherichia B) Escherichia coli C) Pseudomonas D) Leishmania

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Question 234

Which one of the following is not normally a pollutant?

A) Carbon monoxide B) Carbon dioxide C) Hydrocarbons D) Sulphur dioxide

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Question 235

CO emitted by automobiles prevents O-transport to body tissues by ?

A) Changing O2 to CO2 B) Destroying hemoglobin C) Forming a stable compound with hemoglobin D) Obstructing the reaction of O2 with hemoglobin

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Question 236

A chemical harmful released by Chlorofluorocarbon to ozone is ?

A) Nitrogen Peroxide B) Fluorine C) Chlorine D) Sulphur dioxide

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Question 237

As it travels along the food chain, the concentration of DDT ?

A) Increases B) Remains constant C) Decreases D) Fluctuates randomly

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Question 238

Carbon monoxide is a pollutant because it ?

A) Reacts with O2 B) Reacts with hemoglobin C) Inhibits glycolysis D) Inactivates nervous system

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Question 239

Which one of the following statements is wrong in case of Bhopal, (India) tragedy?

A) It took place in the night of December 2/3/1984 B) Methyl Isocyanate gas leakage took place C) Thousands of human beings died D) Radioactive fall out engulfed Bhopal

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Question 240

BOD of a pond is related to ______ in per unit volume of water ?

A) All the plants B) All the nektons C) All the microbes D) All the animals

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