Environmental Science and Ecology - Comprehensive Mock Test 4

Question 31 Easy

Gas leaked during Bhopal tragedy was ?

A) Ethyl isothiocyanate B) Sodium isothiocyanate C) Potassium isothiocyanate D) Methyl isocyanate

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Question 32 Easy

Fluoride pollution mainly affects ?

A) Brain B) Teeth C) Heart D) Kidney

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Question 33 Easy

Fish die in water polluted by sewage due to ?

A) Pathogens B) Reduction in O2 C) Clogging of gills by silt D) Foul smell

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Question 34 Easy

Eutrophication is often seen in ?

A) Mountains B) Deserts C) Fresh water lakes D) Ocean

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Question 35 Medium

Escherichia coli used as an indicator organism to determine pollution of water with ?

A) Industrial effluents B) Heavy metals C) Pollen of aquatic plants D) Faecal matter

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Question 36 Easy

Eutrophication causes decrease in ?

A) Dissolved hydrogen B) Dissolved salts C) Dissolved oxygen D) All of these

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Question 37 Medium

Decomposition of domestic wastes under natural processes is called ?

A) Industrial pollution B) Thermal pollution C) Biodegradable pollution D) Nonbiodegradable pollution

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Question 38 Easy

DDT is a ?

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

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Question 39 Medium

Ultraviolet radiation from sunlight causes the reaction that produces ?

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

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Question 40 Medium

Contamination of water with sewage is indicated by cysts of ?

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

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