Petroleum occurs deep down under the earth between two layers of impervious rocks. Oil deposit are usually found mixed with water, sand and salts. Natural gas occurs above the petroleum oil trapped under the rocks.
Thus option A is correct.
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Similar Questions
Q1
The gas which occurs above the petroleum oil trapped under the rocks is called :
(a) biogas
(b) petroleum gas
(c) natural gas
(d) coal gas
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Q2
The gas which occurs above the petroleum oil trapped under the rocks is called __________.
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Q3
Petroleum gas and natural gas
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Q4
Describe the uses of petroleum and natural gas.
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Q5
Coal, natural gas and petroleum are___________________.