Describe characteristics and uses of coke.
Coke is obtained by burning of coal in absence of oxygen. The process is called destructive distillation.
Characteristics of coke:
i)Tough
ii)porous
iii) black in colour
USES:
Coke is used to manufacture steel.
Coke is used in the extraction of many metals.
Explain the process of formation of petroleum.
Explain why fossil fuels are exhaustible natural resources?
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 year on the Y-axis and the year on the X-axis.
|
1 |
Year 1991 |
Shortage % 7.9 |
|
2 |
1992 |
7.8 |
|
3 |
1993 |
8.3 |
|
. 4 |
1994 |
7.4 |
|
5 |
1995 |
7.1 |
|
6 |
1996 |
9.2 |
|
7 |
1997 |
11.5 |
Kerosene is not a fossil fuel.
