Exams

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

Select the word with the correct spelling.

Magic Marker was invented by _______.

The price of an article is cut by 33%, to restore to its original value, the new price must he increased by

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

To make a long story short

Of the 3 numbers whose average is 22, the first is 3/8th the sum of other 2. What is the first number?

Groundwater is found underground in the zone of

Southerners who were for redemption wanted which of the following?