Q8 of 9 Page 62

Explain the process of formation of petroleum.

Petroleum was formed from dead organisms that got buried in the sea millions of years ago. These dead bodies got covered with layers of sand and clay. Lack of air, high temperature, and high pressure transformed these dead organisms into petroleum and natural gas.

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5

Tick True/False against the following statements.

(a) Fossil fuels can be made in the laboratory. (T / F)


(b) CNG is more polluting fuel than petrol. (T / F)


(c) Coke is almost pure form of carbon. (T / F)


(d) Coal tar is a mixture of various substances. (T / F)


(e) Kerosene is not a fossil fuel. (T / F)

 6

Explain why fossil fuels are exhaustible natural resources.

 7

Describe characteristics and uses of coke.

 9

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.