12. How far is it correct to say that the First World War was fought essentially for the preservation of balance of power? (Answer in 250 words)
13. How far was the Industrial Revolution in England responsible for the decline of handicrafts and cottage industries in India? (Answer in 250 words)
14. The groundwater potential of the gangetic valley is on a serious decline. How may it affect the food security of India? (Answer in 250 words)
15. What are aurora australis and aurora borealis? How are these triggered? (Answer in 250 words)