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Download SGBAU BSc 2019 Summer 3rd Sem Environemtal Science Environmental Chemistry Question Paper

Download SGBAU (Sant Gadge Baba Amravati university) BSc 2019 Summer (Bachelor of Science) 3rd Sem Environemtal Science Environmental Chemistry Previous Question Paper

This post was last modified on 10 February 2020

This download link is referred from the post: SGBAU BSc Last 10 Years 2010-2020 Question Papers || Sant Gadge Baba Amravati university


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B.Sc. Part-II (Semester-III) Examination

ENVIRONMENTAL SCIENCE

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(Environmental Chemistry)

Paper—III

Time : Three Hours] [Maximum Marks : 80

Note :— ALL questions are compulsory and Question No. 2-7 carry equal marks. Draw well labelled diagram wherever necessary.

  1. (A) Fill in the blanks :
    1. __________ is the main component of biogas. ½
    2. --- Content provided by FirstRanker.com ---

    3. DDT stands for __________. ½
    4. Oxygen and __________ are the energy exchange elements. ½
    5. Skin is made up of __________ protein. ½
  2. (B) Choose the correct alternatives :
    1. A solar cell is made up of __________. ½
      1. Silicon
      2. --- Content provided by FirstRanker.com ---

      3. Titanium
      4. Magnesium
      5. Teflon
    2. Which of the following is not a food toxicant ? ½
      1. Preservatives
      2. --- Content provided by FirstRanker.com ---

      3. Flavouring agents
      4. Colours
      5. CO
    3. __________ and __________ are activators and inhibitors elements. ½
      1. Na and Ca
      2. --- Content provided by FirstRanker.com ---

      3. U and Li
      4. Mg and Co
      5. Fe and Ni
    4. Which of the following is the Pentose Sugar ? ½
      1. Erythrose
      2. --- Content provided by FirstRanker.com ---

      3. Glucose
      4. Ribose
      5. Galactose
  3. --- Content provided by FirstRanker.com ---

  4. (C) Answer the following in ONE sentence :
    1. Define OTEC. 1
    2. What are trace elements ? 1
    3. What are enzymes ? 1
    4. Define Biomagnification. 1
  5. --- Content provided by FirstRanker.com ---

  1. (a) Explain the factors that affect solubility of gases in water. 4 (b) Describe the role of nitrogen and phosphorus in plants. 4 (c) Mention any four basic differences in saturated and unsaturated hydrocarbon. 4

    OR

    (d) Give the properties of bases. 4 (e) Give the role of Mg and Ca in plant life 4 (f) Oxygen as a bioelement. 4
  2. (g) Give the classification of carbohydrates. 4 (h) With the help of diagram explain mechanism of enzyme action. 4 (i) Explain any four properties of enzyme. 4

    OR

    (j) Describe properties of fatty acids. 4 (k) Discuss types of proteins. 4 (l) Explain any four properties of Amino Acids. 4
  3. (m) Explain acute and subacute toxicity. 4 (n) Describe Lethal dose and Lethal concentration. 4 (o) How will you differentiate bio-magnification and bio-transformation ? 4

    OR

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    (p) Discuss life cycle test as a chronic toxicity test. 4 (q) Explain the factors that affect toxicity to human beings. 4 (r) Explain Bio-Magnification 4
  4. Describe route of exposure, mode of action and physiological effects of aldrin and BHC. 12

    OR

    What is detoxification ? Describe the detail mechanism of detoxification. 12
  5. Explain structure of water in detail. Discuss in detail physico-chemical properties of water. 12

    OR

    What is chemical speciation ? Discuss about speciation of Pb and Hg. 12
  6. --- Content provided by FirstRanker.com ---

  7. Explain in brief :
    1. Solar chimney. 4
    2. Significance of hydro and wind power as energy resources. 4
    3. Principles and significance of OTEC. 4

    OR

    1. Mechanism of hydropower generation. 4
    2. --- Content provided by FirstRanker.com ---

    3. Mechanism of bioalcohol production. 4
    4. Define renewable energy sources and explain its advantages. 4

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This download link is referred from the post: SGBAU BSc Last 10 Years 2010-2020 Question Papers || Sant Gadge Baba Amravati university