Download SGBAU BSc 2019 Summer 4th Sem Environmental Science Environmental Pollution Question Paper

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Time : Three Hours] [Maximum Marks : 80

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B.Sc. (Part—II) Semester—IV Examination
ENVIRONMENTAL SCIENCE
(Environmental Pollution)

Note :-—All questions are compulsory and questions 2 to 7 carry equal marks.

1. (A) Fill in the blanks : 2
   1. Unwanted sound is called ________. ½

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   2. ________ gas protects life from UV rays. ½
   3. Combination of smoke and fog in atmosphere is called ________. ½
   4. ________ is major green house gas. ½
2. (B) Choose correct option :
   1. A gas associated with Bhopal Gas tragedy is ________. ½
      1. MIC

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      2. CO
      3. PAN
      4. O₃
   2. ________ is unit for noise. ½
      1. pgm

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      2. dB
      3. RAD
      4. S
   3. ________ is ionizing radiation. ½
      1. γ

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      2. microwave
      3. IR
      4. visible
   4. ________ is unit for conductivity. ½
      1. S

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      2. Ω
      3. cm²
      4. ∞

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3. (C) Answer in one sentence each :—
   1. What is SPM ? 1
   2. What is the long form of CFCs ? 1
   3. Define acid rain. 1
   4. Define aerosols. 1

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2. (a) Describe various categories of air pollutants. 4
   (b) Define air pollution and give composition of normal air. 4
   (c) Explain effects of NOx on human beings. 4
   OR
   (e) Explain natural sources of air pollutants. 4
   

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   (f) Explain reactions of SO₂ in atmosphere and resultant effect. 4
3. (g) Explain any two quality characteristics of water. 4
   (h) Describe factors affecting ground water pollution. 4
   (i) Explain various sources of oil pollutants in sea water. 4
   OR
   

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   (j) Describe physical effects of oil in water. 4
   (k) Explain effects of domestic Sewage on Environment. 4
   (l) Explain effects of thermal pollution. 4
4. Discuss how Agricultural wastes, urban wastes and industrial wastes are polluting soil. 12
   OR
   

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   Discuss any three typical Soil pollutants and how soil pollution can be controlled. 12
5. (m) Explain industrial noise and transport noise. 4
   (n) Explain the concept of “Reduction of noise at source” with suitable example. 4
   (o) Describe any two physiological effects of noise on human. 4
   OR
   

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   (p) Suggest any two control measures to control traffic noise. 4
   (q) Explain any two psychological effects of noise on human being. 4
   (r) Explain decibel along with various threshold limit values. 4
6. (s) With the help of suitable reaction explain nuclear fission and its applications. 4
   (t) Describe early radioactive fallout. 4
   

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   (u) Explain any two sources of radiations with typical radiations and its control. 4
   OR
   (v) Explain mechanism of interaction of ionizing radiations to living thing. 4
   (w) Explain mechanism of delayed radioactive fallout. 4
   (x) Describe curie and rad as radiation units. 4

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7. Discuss causes, mechanism, effects and control measure for green house effect. 12
   OR
   Define thermochemical and photochemical smog. Explain causes, mechanism and effect of sulphur smog. 12

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