Environmental Science and Ecology - Comprehensive Mock Test 5

Question 41 Medium

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 42 Medium

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 43 Medium

A chemical harmful released by Chlorofluorocarbon to ozone is ?

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

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Question 44 Medium

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 45 Easy

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 46 Medium

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 47 Medium

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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Question 48 Easy

BOD is connected with ?

A) Microbes B) Organic matter C) Microbes and organic matter D) None of these

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Question 49 Medium

Biochemical Oxygen Demand (BOD) in a river water ?

A) Increases when sewage gets mixed with river water B) Remains unchanged when algal bloom occurs C) Has no relationship with concentration of oxygen in the water D) Gives a measure of salmonella in the water

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Question 50 Medium

Attack of asthma in certain persons may be due to ?

A) Exposure to cold temperature B) Inhalation of some air borne pollen C) Eating of some seasonal vegetables D) Low concentration of CO2 due to increased rate of photosynthesis

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