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Name
Reg No
B
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
07 THRISSUR CLUSTER
FIRST SEMESTER M.TECH. DEGREE EXAMINATION DEC 2017
Civil Engineering
Environmental Engineering
07CE6103 ENVIRONMENTAL CHEMISTRY
Time 3 hours Max. Marks: 60
Answer all six questions. Part of each question is compulsory.
Answer either part or part of each question
Q.no. Module 1 Marks
1a Give the two types of buffer solutions with example and discuss the buffer action
of NH4OH+NH4Cl mixture.
4
Answer b or c
b
Calculate the pH of a solution prepared by mixing 50.ml of 0.02M CH3COOH and
50ml of 0.1M NaOH (Ka =1.8X10-5
5
c
Discuss the buffer capacity of soil.
5
Q.no. Module 2 Marks
2a Explain Hardy Schultz rule. Give any two methods used for the coagulation of
colloids.
4
Answer b or c
b
What is zeta potential? How it is measured? Explain the factors affecting it.
5
c
How the atmospheric colloids are classified based on their source and ii) size.
Give its impact on the weather and climate.
5
Q.no. Module 3 Marks
3a What is nuclear energy? Discuss the theory behind nuclear reactor and atomic
bomb giving reactions.
4
Answer b or c
b How will you store spent fuel and high level radioactive waste. 5
c 18F is found to undergo 90% radioactive decay in 366 min. What is the computed
half life from his observation?
5
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Q.no. Module 4 Marks
4a 0.30 g of CaCO3 was dissolved in HCl and made to one litre. 100 ml of the above
solution required 29ml of EDTA solution on titration. 100 ml of the hard water
sample required 32 ml of the same EDTA solution on titration. After boiling,
cooling and filtering of 100 ml of this water sample required 10 ml of EDTA
solution. Calculate total, temporary and permanent hardness.
4
Answer b or c
b
Describe the major organic, inorganic and metallic pollutants present in water.
5
c
Give the principle and complete procedure for determining BOD of a water sample.
5
Q.no. Module 5 Marks
5a What are persistent organic pollutants? Give the general characteristics of
persistent organic pollutants.
5
Answer b or c
b Discuss the environmental fate of PAHs. 7
c How enzyme cause degradation of pesticides. 7
Q.no. Module 6 Marks
6a State and explain Beer-lambertz law. How it is useful to determine the
concentration of an unknown sample? Explain.
5
Answer b or c
b
Write the principle, instrumentation and applications of UV-visible spectroscopy.
7
c
Describe principle, working and applications of HPLC.
7