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MCQs

General Biology

Total Questions : 1232 | Page 9 of 124 pages
Question 81. The higher the BOD, the
  1.    lower the water pollution
  2.    lesser the bacteria in it
  3.    more the water pollution
  4.    the more the air pollution
 Discuss Question
Answer: Option C. -> more the water pollution
Answer: (c).more the water pollution
Question 82. The word BOD refers to the
  1.    Bidding of Dermatology
  2.    Binding of Dirt
  3.    Biochemical occupied Date
  4.    Biochemical Oxygen demand
 Discuss Question
Answer: Option D. -> Biochemical Oxygen demand
Answer: (d).Biochemical Oxygen demand
Question 83. BOD measures the amount of
  1.    bacteria in a given sample of water
  2.    algae being decomposed in a given sample
  3.    oxygen bacteria need to decompose organic matter in a given sample
  4.    oxygen bacteria need to decompose organic matter in a given sample in a fixed period of time
 Discuss Question
Answer: Option D. -> oxygen bacteria need to decompose organic matter in a given sample in a fixed period of time
Answer: (d).oxygen bacteria need to decompose organic matter in a given sample in a fixed period of time
Question 84. Narrow tolerance of oxygen (O₂) is found in
  1.    humans
  2.    plants
  3.    mammals
  4.    fish
 Discuss Question
Answer: Option D. -> fish
Answer: (d).fish
Question 85. Fish die as a result of water pollution due to
  1.    less BOD
  2.    more tolerance range for oxygen
  3.    narrow tolerance range for oxygen
  4.    zero tolerance range for oxygen
 Discuss Question
Answer: Option C. -> narrow tolerance range for oxygen
Answer: (c).narrow tolerance range for oxygen
Question 86. High concentrations of carbon monoxide (CO)
  1.    reduces capacity of blood transport
  2.    reduces capacity of oxygen transportation through blood in the body
  3.    is caused due to incomplete fossil decay
  4.    is caused due to smog formation
 Discuss Question
Answer: Option B. -> reduces capacity of oxygen transportation through blood in the body
Answer: (b).reduces capacity of oxygen transportation through blood in the body
Question 87. Gaseous pollutants may be carried to other countries to
  1.    form acid rain
  2.    cause acidification of soil
  3.    form alkaline rain
  4.    cause water pollution
 Discuss Question
Answer: Option A. -> form acid rain
Answer: (a).form acid rain
Question 88. If heat radiated from the Earths surface is retained, the outcome will be
  1.    formation of smog
  2.    green house effect
  3.    van der Walls forces of attraction among smoke particles
  4.    all of above
 Discuss Question
Answer: Option B. -> green house effect
Answer: (b).green house effect
Question 89. Exhaust motor vehicle is the main source of
  1.    manganese
  2.    carbon monoxide
  3.    sulphur dioxide
  4.    nitrogen oxide
 Discuss Question
Answer: Option B. -> carbon monoxide
Answer: (b).carbon monoxide
Question 90. Carbon monoxide (CO) causes
  1.    numbness of brain
  2.    secretion of adrenaline
  3.    weakens the wall of alveoli
  4.    risk of atherosclerosis
 Discuss Question
Answer: Option D. -> risk of atherosclerosis
Answer: (d).risk of atherosclerosis

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