M.Sc. (Semester III) Examination Nov/Dec-2018
INORGANIC CHEMISTRY
ENVIRONMENTAL CHEMISTRY
Time: 2½ Hours Max. Marks: 70
Instructions: All questions are compulsory.
Q.1 Multiple choice questions 14
Sinks of atmospheric gases are
Oceans and vegetation Soil micro-organism
Lime stone well All act as sinks
Bhopal gas tragedy is a case of
Air pollution Thermal pollution
Soil pollution Nuclear pollution
Low levels of CO (less than 10 ppm) can be conveniently measured by
IR Gas Chromatography
HPLC UV
Which one of the following pollutant can be analyzed by cold-vapour AAS?
Hg Cr
Mn All
The attack of acid on marble is known as
Stone leprosy Stone deprosy
Both a b None of the above
When did Seveso accident occur?
1974 1975
1976 1977
Which of the following element was dropped to the core of Chernobyl reactor
to extinguish fire?
Boron Sulfur
Zinc Bromine
Progressive warming up of the earth's surface due to blanketing effect of
manmade CO2 in the atmosphere is known as
Green-house effect Heat effect
CO2 effect None of the above
Which reagent is used for analysis of iron in water by colorimetric method?
Thiocyanate Phenanthroline
Both a b None of these
10) Pesticides can be biodegraded by
Oxidation Reductive dechlorination
Dehydrochlorination All
11) The residual dissolved inorganic impurities from the waste water can be
removed by
Ion exchange Oxidation
Chlorination Coagulation
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12) The biggest radiation hazards come from
X-rays Cosmic rays
Alpha rays Microwaves
13) The most common technique for sampling particulates is
Sedimentation Filtration
Impingement Thermal precipitation
14) All nuclear reactors rely on as fuel.
Thorium Uranium
Tritium Radium
Q.2 Answer the following (any four) 08
List the general options to control the acid rain.
Why anaerobic waste water treatment is preferred as compared to other
processes?
List the effects of ionizing radiation on the human life?
Which of the degraded product of DDT is most toxic?
Mention at least two objectives of monitoring of air pollutants.
Write notes on (any two) 06
What are the pesticide residue sources in the environment?
What are the sourced of CO emission?
Describe in brief the cold trapping method for sampling of gaseous
effluents.
Q.3 Answer the following (any two) 08
What are the hazardous effects of acid rain?
Write the different reactions involved in coagulation process used for
water purification using alum, FeSO4 and FeCI3.
What is Three Mile Island disaster related with? Discuss in short.
Answer the following (any one) 06
What is global warming and what are its effects in the life of human
being?
Describe the activated sludge process for water treatment.
Q.4 Answer the following (any two) 10
Describe briefly the principle and working of oxygen electrode.
Give a brief account to the Bhopal disaster.
What are the effects of water pollutants on life?
Answer the following (any one) 04
Describe the suitable methods for the analysis of organomercurials.
What type of preventive measures should be adopted to protect from
radiation pollution?
Q.5 Answer the following (any two) 14
Give a brief account of air pollution problems in India. What are the effects of
gaseous air pollutants on health of human beings?
Explain in detail softening and demineralization of water by ion-exchange
process.
What do you mean by ozone layer depletion? Mention the reactions involved
in ozone layer depletion and mention the consequences of ozone layer
deletion on the environment.