27,

28.

29.

30.

81.
82.
38.
34.
86.
96.
37.
38.

Which of the following reacts with haemoglobin of blood to produce toxic effect?

(9) Carbon dioxide ¢ (b) Carbon monoxide

(9) Oxygen (6) Nitrogen dioxide
North east monsoon brings maximum rainfall to :

(8) Mumbai (0) भां

(9) Kolkata (6) Chennai

A test widely used in treatment facilities along with BOD to indicate toxic substances or
biologically resistant prganic substances is :

(a) Measure of electrical conductivity (0) Measure of pH
(9 Determination of Heavy metals (ध) Measure of COD

The role of N20 in the stratosphere is to :
(8) Increase the global warming potential (b) Enter the ozone destruction ಲಂ

10). 01/000೮ 171020 018 7107000 (ध) Induce acid rain
(30 x 4 = 120}

۲117

Answer ALL questions. Answer shall be limited to one paragraph.
Questions 31 t6 38 carry 10 marks each.

What are the major reasons for the accumulation of e-waste in recent years?

Explain 'photochemical smog' and its effects.

Elaborate on household hazardous wastes and its disposal,

Write notes on the impact Ozone depletion and Global warming.

Discuss in detail the importance of wetlands.

Comment on biomagnifications of pesticides സള food chain.

Write down the physiological and psychological effects of noise pollution on human beings.

What is meant by biodiversity hotspot? How many biodiversity hotspots are there 10 Iridia

and name them? (8 + 10 = 80)

4 69/2015