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Pradeep Kumar

· started a discussion

· 1 Months ago

Wrong answer (Question: 270603.0 )

Correct- Option A

Question:

Directions: You have brief passages with questions following each passage. Read the passages carefully and choose the most appropriate answer to the questions out of the four alternatives.


Crude mineral oil comes out of the earth as a thick brown or black liquid with a strong smell. It is a complex mixture of many different substances, each with its own individual qualities. Most of them are combinations of hydrogen and carbon in varying proportions. Such hydrocarbons are also found in other forms such as bitumen, asphalt and natural gas. Mineral oil originates from the carcasses of tiny animals and from plants that live in the sea. Over millions of years, these dead creatures form large deposits under the sea bed and ocean currents cover them with a blanket of sand and slit. As this material hardens, it becomes sedimentary rock and effectively shuts out the oxygen, so preventing the complete decomposition of the marine deposits underneath. The layers of sedimentary rock become thicker, and heavier. Their pressure produces heat, which transforms the tiny carcasses into crude oil in a process that is still going on.

Mineral deposits under the sea do not get decomposed because they:

Options:
A)

become rock and prevent oxygen from entering them

B)

are covered by the sand and slit brought by the current

C)

contain a mixture of hydrogen and carbon

D)

are constantly washed by the ocean current

Solution:

Ans: (b) are covered by the sand and slit brought by the current

Kundan Kumar

· commented

· 1 Months ago

You are right
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