Questions

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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.

How does crude oil come out of the earth ?

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.

Be worlds apart

Thunder Cloud happens in which layer of the atmosphere?

Who is considered the promoter of Bhakti Movement in Bengal?

In 1941, who commanded U.S troops in Europe?

Effective sales management begins with

Find the volume (in cub.cm) of a sphere of diameter 42 cm

In the following question, four words are given out of which one word is incorrectly spelt. Select the incorrectly spelt word.