Questions

In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement".

We protested that we (was going) all the way to Haridwar.

Right to education in our country is a _________right.

The phenomenon of change in direction of light when it passes from one medium to another is called

Find the acceleration (in m/s2) produced in a body of mass 4 kg when a force of 24 N is applied on it.

June 21 marks the winter solstice in the _________ Hemisphere.

The Environment (Protection) Act of India was enacted in the year -

Salil Parekh, who took charge as the new CEO of Infosys, is moving out from which company to join and lead Infosys?

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