Master of Science I (Environmental Science)
Examination: Oct Nov 2016 Semester I (New CBCS)
SLR No. Day
Date Time Subject Name Paper
No. Seat No.
SLR SF
406
Friday
18/11/2016
10:30 AM
to
01:00 PM
Environmental Chemistry
C
HCT 1.2
Instructions: Answer any five questions.
All questions carry equal marks.
Q.1 is compulsory.
Attempt any two from Q.2, 3 4
Attempt any two short note questions from 6 7
Draw neat and labeled diagrams wherever necessary.
Total Marks:70
Q.1 Choose the correct from following: 14
Compounds of which of the following element are generally present in
colloidal state in natural waters
Fe Si
AL All
The alkalinity of natural waters is usually due to the presence of
HCO3 CO2
3
OH All
Which of the following is the source of carbon in aquatic environment
(oceans)
Living organism Sedimentary carbonate material
Dissolved organic matter Dissolved inorganic matter
All
Inorganic tin may undergo alkylation in aquatic environment to form
Monomethyl tin Dimethyl tin
Both None
Humic material in water may be found
In free form Complexes with metal ion
Complexed wit organic Species All
Odour in water can be eliminated from water by
Activated carbon Chlorination
Aeration Ozone
Liquids in gas aerosol are
Clouds Fog
Mist Smog
All
Arosols may be in the form of
Smoke Dust
Mist All
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The diesel vehicles pollute the environment largely thought
NOx Particulates
CO Unburnt hydrocarbons
All
10) The biofule fraction in diesel is
Biodegradable Non-toxi
Oxygen rich for efficient
combustion
All
11) Exposure to mercury can cause
Neurotoxicity Speech and visual impairment
Kidney failure Alzheimer's diseases
All
12) Which of the following are climatic physical weathering agents
Temperaure Wind
Water All
13) Radioictive waste may contain radioactive isotope
Sr-90 I-129
Cs-137 All
14) Co2 realeases from mining activity causes
Green house effect Global warming
Climate Change All
Q.2 Explain the Green house effect with neat labeled diagram 14
Q.3 Explain the following 14
Emulsion
First law of thermodynamics
Lamberts law
Chemical potential
Q.4 Explain the importance of nitrogen cycle in atmosphere. Add a note on factors
affecting soil fertility.
14
Q.5 Write short notes on- 14
Molarity normality
Bhopal Gas disaster
Q.6 Sketch a neat labeled diagram of 14
Structure and Composition of air
Soil profile
Q.7 Write importance and process of- 14
Soil organic matter
Sedimentation and Coagulation