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MCQs

Total Questions : 360 | Page 5 of 36 pages
Question 41. What is the size of the particles categorised as aerosols?
  1.    Greater than 1 micron
  2.    Less than 1 micron
  3.    Between 0.01-1 micron
  4.    Less than 0.01 micron
 Discuss Question
Answer: Option C. -> Between 0.01-1 micron
Answer: (c).Between 0.01-1 micron
Question 42. In plants, acid leach, important elements in soil, resulting in reduced
  1.    Photosynthesis
  2.    Growth
  3.    Evaporation
  4.    Transpiration
 Discuss Question
Answer: Option B. -> Growth
Answer: (b).Growth
Question 43. Volcanoes' and 'natural firs' are natural sources of
  1.    Cl
  2.    HCl
  3.    Nitric Oxide
  4.    Sulphur Oxide
 Discuss Question
Answer: Option D. -> Sulphur Oxide
Answer: (d).Sulphur Oxide
Question 44. What does the aerodynamic diameter of an aerosol indicate?
  1.    Size of the aerosol particle when floating in air
  2.    Equivalent diameter of a sphere having same volume as that of the aerosol
  3.    Average diameter of aerosol particles present in unit volume of air
  4.    Maximum size of aerosol particle that can float in the air
 Discuss Question
Answer: Option B. -> Equivalent diameter of a sphere having same volume as that of the aerosol
Answer: (b).Equivalent diameter of a sphere having same volume as that of the aerosol
Question 45. What damages house paints?
  1.    Water pollution
  2.    Acid Deposition
  3.    CFCs
  4.    Nox
 Discuss Question
Answer: Option B. -> Acid Deposition
Answer: (b).Acid Deposition
Question 46. What is 'PH' of rainwater ?
  1.    5.7
  2.    9
  3.    4
  4.    3
 Discuss Question
Answer: Option A. -> 5.7
Answer: (a).5.7
Question 47. In Europe and Scandinavia, 'PH' value of rain and snow is
  1.    2 to 4
  2.    4 to 5
  3.    3 to 5
  4.    9
 Discuss Question
Answer: Option C. -> 3 to 5
Answer: (c).3 to 5
Question 48. Weak acids, only capable of adding, fewer
  1.    H₂ ions
  2.    HCl ions
  3.    Cl ions
  4.    P ions
 Discuss Question
Answer: Option A. -> H₂ ions
Answer: (a).H₂ ions
Question 49. What does needles and leaves develop ?
  1.    Black spots
  2.    Green spots
  3.    White spots
  4.    Brown spots
 Discuss Question
Answer: Option D. -> Brown spots
Answer: (d).Brown spots
Question 50. Lowest 'pH' measurement observed in kane and Pennsylvania, was approximately
  1.    2.9
  2.    4
  3.    3
  4.    2.7
 Discuss Question
Answer: Option D. -> 2.7
Answer: (d).2.7

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