Solution: (d)
Digboi is a town and a town area committee in Tinsukia district in the north-eastern part of the state of Assam. Today, though the crude production is not high, Digboi has the distinction of being India’s oldest continuously producing oilfield. Digboi refinery, now a division of Indian Oil Corporation, is the world’s oldest oil refinery still in operation.
The Gondwana Coal fields are found in
(a) Madhya Pradesh
(b) West Bengal
(c) Assam
(d) Jammu & Kashmir
Solution: (a)
Almost all of India’s coal reserves are of Gondwana coal. The Gondwana coal is said to be 250 million years old and includes mainly coking, non-coking and bituminous coal. The Gondwana coalfields extend from Bengal, Jharkhand, Bihar, Odisha to Madhya Pradesh.
In the world, India is tops in the production of
(a) Nickel
(b) Uranium
(c) Mica
(d) Manganese
Solution: (c)
Mica is produced in huge proportion in India. In fact, India is one of the leading suppliers of mica to the world. India alone accounts for a major portion of the world‘s export of block mica and mica splitting. India produces approximate 90 % of the world‘s mica. It is an indispensable component of the electrical industry. India accounts for 60 % of mica embarking in international trade.
India is one of the largest producers of manganese ore in the world along with
(a) China and Russia
(b) Brazil and Russia
(c) Australia and U.S.A.
(d) South Africa and the U.S.A.
Solution: (b)
About 80% of the known world manganese resources are found in South Africa; other important manganese deposits are in Ukraine, Australia, India, China, Gabon and Brazil. The 96% of global production of manganese today is from barely 7 countries viz. CIS, RSA, Brazil, Gabon, Australia, China and India in decreasing order of tonnages raised annually. The global resource base is close to 12 billion tonnes including Indian reserve of about 240 million tonnes. Indian manganese ores are preferred by many as they are generally hard, lumpy and amenable to easy reduction. In the Indian continent, the deposition of manganese must have taken place in varying environmental settings and by different geological processes but the sedimentary mode of formation far outweighed other methods such as supergene enrichment etc.
Jadugoda mines are famous for
(a) iron ore
(b) mica deposits
(c) gold deposits
(d) uranium deposits
Solution: (d)
The Jaduguda Mine is a uranium mine in Jaduguda village in the Purbi Singhbhum district of the Indian state of Jharkhand. It commenced operation in 1967 and was the first uranium mine in India. The deposits at this main were discovered in 1951. As of March 2012 India only possesses two functional uranium mines, including the Jaduguda Mine.
