Environmental Chemistry

Course: M.Sc Code: EF-398 Branch: Chemistry Year: 2021

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Roll No.
Total No. of Questions : 11
[Total No. of Printed Pages : 5

EF-398

M.Sc. IIIrd Semester (New/ATKT)

Examination, 2021-22

Chemistry

Paper - III

Environmental Chemistry

Time : 3 Hours]
[Maximum Marks : 85

Note :- Attempt all questions.

SECTION - 'A'

Objective Type Questions        5×2=10

Note :- Objective type 5 questions of 2 marks each.

1.
Choose the correct answer

(i) The Outermost Layer of the atmosphere is called the :

(a) Troposphere

(b) Stratosphere

(c) Thermosphere

(d) Mesosphere

(ii) Acid rain is caused by emission of

(a) SO2

(b) NO3

(c) Both a and b

(d) CO2

(iii) What is the indicator of pollution in water

(a) Amount of oxygen

(b) Amount of hydrogen

(c) Amount of oil

(d) Amount of nitrogen

(iv) Which of the following is not a primary soil macronutrient

(a) Nitrogen

(b) Phosphorus

(c) Potassium

(d) Iron

(v) Which one is not a toxic heavy metal :

(a) Hg

(b) Pb

(c) Ca

(d) Cd

SECTION - 'B'

Short Answers Type Questions        5×5=25

Note :- Short answer type 5 questions of 5 marks each with internal choice.

2.
Write a note on Temperature inversion.

OR

Write a note on photochemical smog.
3.
Write short notes on the following:

(a) Acid rain

(b) Green house effect

OR

Write short notes on the following :

(a) Global warming

(b) Aerosols

4.
What is petrification.

SECTION - 'C'

Long Answers Type Questions        5×10=50

Note :- Long answer types 5 questions of 10 marks each with internal choice.

5.
Write a note on redox chemistry in natural water.

OR

Write a note on polynuclear aromatic hydrocarbons.
6.
Discuss micro and macro nutrients.

OR

Write a note on Bhopal gas tragedy.
7.
What are biogeochemical cycles explain with reference of carbon in detail.

OR

Explain in detail the mechanism of photochemical decomposition of NO2.
8.
What is Ozone depletion explain the mechanism in detail.

OR

What are green house gases explain the green house effect in detail.
9.
Write notes on :

(a) Treatment of waste and sewage

(b) Dissolved oxygen

OR

Write notes on :

(a) Techniques of purification

(b) Chemical oxygen demand

10.
What are pesticides explain in detail the classification, properties and uses of organochlorine pesticides.

OR

Write notes on :

(a) Ionospheres

(b) Polychlorinated biphenyls

11.
Describe Soil composition and methods of re-mediation of soil.

OR

Write notes on :

(a) London Smog

(b) Bhopal gas tragedy

EF-398

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