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MCQs

Total Questions : 498 | Page 47 of 50 pages
Question 461. Exotic species are also known as
  1.    Aquatic hitch hikers
  2.    Foreign Species
  3.    Non indigenous
  4.    All of above
 Discuss Question
Answer: Option A. -> Aquatic hitch hikers
Answer: (a).Aquatic hitch hikers
Question 462. CFCs depletes ozone layer in the
  1.    Stratosphere
  2.    Troposphere
  3.    Biosphere
  4.    Hydrosphere
 Discuss Question
Answer: Option A. -> Stratosphere
Answer: (a).Stratosphere
Question 463. Largest form of an aquatic pollution is defined as
  1.    Industrial Pollution
  2.    Run off
  3.    Oil Spillage
  4.    Atmosphere
 Discuss Question
Answer: Option C. -> Oil Spillage
Answer: (c).Oil Spillage
Question 464. MeHg stands for
  1.    Methyl methane
  2.    Methane mercury
  3.    Methyl mercury
  4.    Mercury methane
 Discuss Question
Answer: Option C. -> Methyl mercury
Answer: (c).Methyl mercury
Question 465. In nature, mercury is found in different forms, such as elemental, metallic and
  1.    Organic mercury compound
  2.    Inorganic mercury compound
  3.    Toxic compound
  4.    non-toxic compound
 Discuss Question
Answer: Option B. -> Inorganic mercury compound
Answer: (b).Inorganic mercury compound
Question 466. In living organisms, high cadmium leads to cancer, hypertension and
  1.    Organ damage
  2.    Cell membrane
  3.    Kidney damage
  4.    heart faliure
 Discuss Question
Answer: Option C. -> Kidney damage
Answer: (c).Kidney damage
Question 467. About 20-90 ppm cadmium is emitted from
  1.    Burning of coal
  2.    Fossil fuels
  3.    Car tyres
  4.    factories
 Discuss Question
Answer: Option C. -> Car tyres
Answer: (c).Car tyres
Question 468. About 0.25-0.5 ppm of cadmium is originated from
  1.    Volcanoes
  2.    Coal burning
  3.    Fire
  4.    dust fibers
 Discuss Question
Answer: Option B. -> Coal burning
Answer: (b).Coal burning
Question 469. Almost, 75% of mercury in marine environment originated from natural sources, such as
  1.    Eroding ores
  2.    Fishes
  3.    Sea Shells
  4.    Corals
 Discuss Question
Answer: Option A. -> Eroding ores
Answer: (a).Eroding ores
Question 470. DMHg stands for
  1.    Di methane mercury
  2.    Dimethyl mercury
  3.    Di methane methyl
  4.    Di methyl methane
 Discuss Question
Answer: Option B. -> Dimethyl mercury
Answer: (b).Dimethyl mercury

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