Questions

Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.

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 million of years, these dead creatures form large deposits under sea­bed and ocean currents cover them with a blanket of sand and silt. As this material hardens, it becomes sedimentary rock and effectively shuts out the oxygen, thus preventing the complete decomposition of the marine deposits underneath. The layers of sedimentary rocks become thicker, and heavier. Their pressure produces heat, which transforms the tiny carcasses into crude oil in a process that is still going on today.

Sedimentary rocks leads to the formation of oil deposits because

Improve the bracketed part of the sentence.
I had not completed my project so I thought I was (done with) when the manager asked me to hand it in.

Khas Mahal and the Shish Mahal are built in which World Heritage Monument?

What element is used to disinfect swimming pools?

The least penetrating power ray is

AV= constant, where A= area of cross-section and V= velocity of fluid. This equation is called _____.

Which one of the following is not a type of coal?

Chandragupta Maurya was an ardent follower of __________.