1.
Which of the following are the green house gas.
2.
_______________ contains 98% of carbon.
3.
Which one is called black gold?
4.
The main constituent of natural gas is :
5.
The slurry residue after obtaining biogas is used as
7.
Coal mines in our country are in :
8.
Which of the following is not a fossil fuel ?
9.
Coke is Starting material for the preparation of
10.
....................... is renewable source of energy.
