Questions

In the following question, out of the four alternatives, select the word similar in meaning to the word given.
Haste

Potassium Permanganate is used for purifying drinking water, because________

Which among the following is not an example of emulsion?

In the following question, out of the four alternatives, choose the word which is opposite in meaning to the given word and click the button corresponding to it.

INVALUABLE

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.

The time taken for the marine deposits to harden into rocks is

The Razmnama is a Persian translation of the _____________.

The manufacturer does not want to use it, the buyer does not need to use it and the user does not know he is using it. What is it?

If θ be positive acute angle and 5cosθ + 12sinθ = 13, then the value of cosθ is