Civil Service Preliminary Paper-1 Previous Year Questions on General Science - 2012

1) The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere, because it absorbs
(A)  the water vapour of the air and retains its heat
(B)  he UV part of the solar radiation
(C)  all the solar radiations
(D)  the infrared part of the solar radiation



2) Which one of the following sets of elements was primarily responsible for the origin of life on the Earth?
(A) Hydrogen, Oxygen, Sodium
(B) Carbon, Hydrogen, Nitrogen
(C) Oxygen, Calcium, Phosphorous
(D) Carbon, Hydrogen, Potassium
Answer: B

3) To meet its rapidly growing energy demand, some opine that India should pursue research and development on thorium as the future fuel of nuclear energy. In this context what advantage does thorium hold over uranium?
1. Thorium is far more abundant in nature than uranium.
2. On the basis per unit mass of mined mineral, thorium can generate more energy compared to natural uranium.
3. Thorium produces less harmful waste compared to uranium.

Which of the above are correct
(A) 1 only
(B) 2 and 3
(C) 1 and 3
(D) 1, 2 and 3


4) A person stood alone in a desert on a dark night and wanted to reach his village which was situated 5km east of the point where he was standing .He had no instruments to find the direction but he located the polestar, the most convenient way now to reach his village is to walk in the
(A) facing the polestar
(B) opposite to the polestar
(C) keeping the polestar to his left
(D) keeping the polestar to his right


5) Consider the following kinds of organisms:
1.  Bat
2.  Bee
3.  Bird

which of the above is/are pollinating agent/agents?
(A) 1 and 2 only
(B) 2 only
(C) 1 and 3 only
(D) 1, 2 and 3


6) Consider the following statements:
If there were no phenomenon of capillarity
1 it would be difficult to use a kerosene lamp
2 one would not be able to use a straw to consume a soft drink
3 the blotting paper would paper would fail to function
4 the big trees that we see around would not have grown on the earth

Which of the following statements given above are correct?
(A) 1, 2 and 3 only
(B) 1, 3 and 4 only
(C) 2 and 4 only
(D) 1, 2, 3 and 4


7) Consider the following kinds of organisms:
1 Bacteria
2 fungi
3 flowering plants
some species of which of the above kinds of organisms are employed as bio pesticides?
(A) 1 only 
(B) 2 and 3 only
(C) 1 and 3 only
(D) 1, 2 and 3


8) Which of the following is/are cited by the scientists as evidence/evidences for the continued expansion of universe?
1. Detection of microwaves in space
2. Observation of red shift phenomenon in space
3. Movement of asteroids in space
4. Occurrence of supernova explosions in space code

(A) 1 and 2 only 
(B) 2 only
(C) 1 ,3 and 4
(D) None of the above can be cited as evidence.


9) Electrically charged particles from space travelling at speeds of several hundred km/sec can severely harm living beings if they reach the surface of the earth. What prevents them from reaching the surface of the earth?
(A) The Earth's magnetic field diverts them toward its poles
(B) Ozone layer around the Earth reflects them back to outer space
(C) Moister in the upper layers of atmosphere prevents them from reaching the surface of the Earth
(D) None of the statements (A), (B) and (C) is correct.

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