IAS Prelims 2013 Paper 2 CSAT Solved (Part 14 of 18)

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Direction, for the following 2 (two) items:

Read the following passage and answer the two items that follow. Your answers to these items should be based on the passage only.


Crude mineral oil comes out of the earth as a thick brown or black liquid with a strong 5mell. 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 millions of years, these dead creatures form large deposits under the sea-bed; and ocean currents cover them with a blanket of sand and silt. As this mineral hardens. It becomes sedimentary rock and effectively shuts out the oxygen, to preventing the complete decomposition of the marine deposits underneath. The layers of sedimentary rock 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.

  1. Mineral oil deposits under the sea do not get completely decomposed because they

    1. are constantly washed by the ocean current.

    2. become rock and prevent oxygen from entering them.

    3. Contain a mixture of hydrogen and carbon.

    4. are carcasses of organizing lying in saline conditions.

    Answer: b

  2. Sedimentary rock leads to the formation of oil deposits because

    1. there are no saline conditions below t.

    2. it allows some dissolved oxygen to enter the dead organic matter below it.

    3. weight of overlying sediment layers causes the production of heat.

    4. it contains the substances that catalyze the chemical reactions required to change dead organisms into oil.

    Answer: c

  3. In a class of 45 students, a boy is ranked 20th, When two boys joined, his rank was dropped by one. What is his new rank from the end?

    1. 25th

    2. 26

    3. 27th

    4. 28th

    Answer: c

  4. A thief running at 8 km/hr is chased by a policeman whose speed is 10 km/hr. If the thief is 100 m ahead of the policeman, then the time required for the policeman to catch the thief will be

    1. 2min

    2. 3min

    3. 4min

    4. 6 min

    Answer: b

  5. A train travels at a certain average speed for a distance of 63 km and then travel a distance of 72 km at an average speed of 6 km/hr more than its original speed. If it takes 3 hours to complete the total journey, what is the original speed of the train in km/hr?

    1. 24

    2. 33

    3. 42

    4. 66

    Answer: c