This download link is referred from the post: SGBAU BSc Last 10 Years 2010-2020 Question Papers || Sant Gadge Baba Amravati university
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.
- (A) Fill in the blanks :
- __________ is the main component of biogas. ½
- DDT stands for __________. ½
- Oxygen and __________ are the energy exchange elements. ½
- Skin is made up of __________ protein. ½
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- (B) Choose the correct alternatives :
- A solar cell is made up of __________. ½
- Silicon
- Titanium
- Magnesium
- Teflon
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- Which of the following is not a food toxicant ? ½
- Preservatives
- Flavouring agents
- Colours
- CO
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- __________ and __________ are activators and inhibitors elements. ½
- Na and Ca
- U and Li
- Mg and Co
- Fe and Ni
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- Which of the following is the Pentose Sugar ? ½
- Erythrose
- Glucose
- Ribose
- Galactose
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- A solar cell is made up of __________. ½
- (C) Answer the following in ONE sentence :
- Define OTEC. 1
- What are trace elements ? 1
- What are enzymes ? 1
- Define Biomagnification. 1
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- (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 - (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 - (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 - 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 - 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 - Explain in brief :
- Solar chimney. 4
- Significance of hydro and wind power as energy resources. 4
- Principles and significance of OTEC. 4
OR
- Mechanism of hydropower generation. 4
- Mechanism of bioalcohol production. 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