(a) where and when was the world's first oil well drilled ?
(b) Where and when was oil first struck in India ?
What is the name of the first oil well drilled in 1974 in India.
(i) Name the process of conversion of wood into coal.
(ii) Name the country which is the leading producer of petroleum.
(iii) Name the gas that occurs over petroleum in reservoirs deep inside the earth.
(iv)Where and when was the first oil well drilled?
(v) What is the full form of PCRA?