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MCQs

Total Questions : 360 | Page 4 of 36 pages
Question 31. What is the pH required for the survival of aquatic animals and plants?
  1.    7
  2.    7.5
  3.    6.5
  4.    4.8
 Discuss Question
Answer: Option D. -> 4.8
Answer: (d).4.8
Question 32. Which of the following gases is responsible for the yellowing of the Taj Mahal?
  1.    Organic carbon
  2.    Black carbon
  3.    Brown carbon
  4.    All of the mentioned
 Discuss Question
Answer: Option D. -> All of the mentioned
Answer: (d).All of the mentioned
Question 33. The acidic air pollutants reach the Earth’s surface because of wet deposition only.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 34. The size of aerosol particles formed mechanically is minimum 1 micron.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 35. Formation of aerosols by nucleation produces particles of size __________
  1.    Less than 0.1 micron
  2.    Greater than 0.1 micron
  3.    Less than 1 micron
  4.    Greater than 1 micron
 Discuss Question
Answer: Option A. -> Less than 0.1 micron
Answer: (a).Less than 0.1 micron
Question 36. When light is passed through a suspension, it’s intensity decreases due to _________
  1.    Both scattering and diffraction
  2.    Both diffraction and absorption
  3.    Absorption only
  4.    Both scattering and absorption
 Discuss Question
Answer: Option D. -> Both scattering and absorption
Answer: (d).Both scattering and absorption
Question 37. What type of colloid is an aerosol?
  1.    Solid in gas
  2.    Gas in solid or fluid
  3.    Fluid in gas
  4.    Fluid or solid in gas
 Discuss Question
Answer: Option D. -> Fluid or solid in gas
Answer: (d).Fluid or solid in gas
Question 38. What does CNC stand for in the context of aerosol particles?
  1.    Cloudy nucleic condensation
  2.    Condensation nucleus counter
  3.    Chemical nucleic coagulation
  4.    Cloudy nucleic coagulation
 Discuss Question
Answer: Option B. -> Condensation nucleus counter
Answer: (b).Condensation nucleus counter
Question 39. What is/are the inertial method(s) used to measure size of aerosol particles?
  1.    Particle acceleration method
  2.    Pulsation method
  3.    Multi cyclone
  4.    All of the mentioned
 Discuss Question
Answer: Option D. -> All of the mentioned
Answer: (d).All of the mentioned
Question 40. Aerosols contribute to global warming.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False

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