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Anshika Goyal

· started a discussion

· 1 Months ago

why not A (Question: 270603.4 )

it is in the 5th line that they start talking about the formation of oil.. usse pehle it talks about various it exists in, its proportion etc

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.

The most appropriate title for the passage is:

Options:
A)

crude mineral oil

B)

how sedimentary rock is formed

C)

how mineral oil is formed

D)

marine deposits under the sea

Solution:

Ans: (c) how mineral oil is formed

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