Questions

Big landlords or warrior chiefs in the seventh century were acknowledged as _________ by the existing kings?

Which of the following was invented by Sir Humphry Davy?

Which actress has been awarded with 64th National film Awards 2017?

Which one of the following is the name of Nobel Prize ­ winning Indian?

At what point does the line 2x - 3y = 6 cuts the X axis?

In the following question, four words are given, out of which only one word is correctly spelt. Find the correctly spelt word.

In the following question, a sentence / a part of sentence is underlined. Below are given alternatives to the underlined part which may improve the sentence. Choose the correct alternative. In case no improvement is required, choose "No Improvement" option.

The student told her teacher to explain the passage.

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.

From where does mineral oil originate?