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6 ച) What are limitations in harnessing the tidal energy? (2)
a2) Write down the scope of wind mills in Kerala? (3)

OR
01) List out the advantages and disadvantages of conventional sources of energy. (5)
7 31) _ Describe the role of urbanisation towards water scarcity (2)
a2) What are the characteristics of a sustainable city? (3)

OR

01) Incorporating sustainability concepts in our activities add value to any (5)
business. What concepts you wish to consider or keep in mind while starting a
business venture?

8 al) What are the push - pull factors affecting rural-urban migration? (2)
a2) How industries can make profit, by reducing the carbon foot print? (3)
OR
bl) Write down any five principles of green engineering. (5)
PART ‏تا‎

(Read the Stories/Cases/Data set as the case may be, and answer all questions, each
full question carries 10 marks.)
Stories/Cases/Data set - 1
(Stories/Cases/Data set)

Indian researchers have developed a new reusable composite material made out of rare earth
oxide, Ceria, which in the presence of sunlight can purify the rivers flowing with polluted water.
The Ceria based nano materials developed by them can effectively degrade microbes and
chemical dyes in water due to their superior photo-catalytic activity. The E Coli bacteria forming
units per millilitre was reduced from 200 million units to less than 100 units in 80 minutes when
exposed to visible light. The compound was able to remain stable even after several cycles of
usage with polluted waters.

Module I
9 9) Identify the novel approach proposed, for the sustainability of river water (3)
b) | What are the major issues faced by our water bodies? (3)
c) Can this new technique be a solution for solving the scarcity of drinking (4)

water?
Stories/Cases/Data set - 2
(Stories/Cases/Data set)
The worst flood affected in Kerala was in August 2018. This was due to the unusually high
rainfall during the monsoon season. About 500 people died, and many were missing. At least a
million people were evacuated. All 14 districts of the state were placed on red alert. Most of the
dams within the state were opened for the first time in the history. Heavy rains in Wayanad and
Idukki have caused severe landslides and have left the hilly districts isolated. According to the
Kerala government, one-sixth of the total population of Kerala had been directly affected by the
floods and flood-related incidents.

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