Question

(a) Why is hydrogen considered as a better and cleaner fuel than CNG ?
(b) Mention any two areas where solar cells are used as a source of energy.
(c) State the biggest hindrance in trapping geothermal energy.
CBSE Class X Science SA 2 (3 Marks)

Answer 1

Ans. Because the burning of hydrogen releases water and burning of CNG produces carbon dioxide. The gas causes green house effect on the earth.