Q6. Explain why fossil fuels are exhaustible natural resources.
Answer – Fossil fuels are exhaustible natural resources because they are limited in nature and cannot be provided in the laboratory.
It takes millions of years to be formed.
Q7. Describe the characteristics and uses of coke.
Answer – Characteristic of coke-
It is a pure form of carbon(98%)
It is tough and porous.
It produces very little smoke.
Uses of coke-
It is used in the manufacture of steel and in the extraction of many metals.
It is used for producing water gas.
8. Explain the process of the formation of petroleum.
Answer – Petroleum is formed by dead aquatic animals and plants that get buried in sea millions of years ago. They got covered by a layer of sand and clay. Due to lack of air, high temperature and high pressure these dead organisms convert into petroleum and natural gas.
Q9. The following table shows the total power shortage in India from 1991-1997. Show the data in the form of a graph. Plot shortage percentage for the years on the Y-axis and the year on the X-axis.
Finally, Science Class 8-Chapter 5-Coal and Petroleum- NCERT Exercise Solution ( Question-Answer) ended 🤞🤞🤞🤞