GS1-20

General Science Mock Test

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1. In the Northern Hemisphere, the spring and summer seasons together last about five days longer than the fall and winter seasons together because the
Seasons are defined by the mean air temperature over the entire Northern Hemisphere
Earth is closest to the sun in January, causing the Earth to move about its orbit faster
Greater area of continental masses in the Northern Hemisphere makes the Earth “top-Heavy”
Rotation rate of the Earth about its axis increases when greater amounts of energy are received from the sun in the summer

2. Of the following, the best method of determining the Earth’s age is by studying the
Rate of increase in saline content of the oceans
Ratio of Uranium to Thorium content to lead content in granite rock.
Percentage of radioactive carbon-14 in organic remains
number of annual rings found in fossilized wood.

3. Polarized sunglasses are used to cut glare from sunlight reflected at a glancing angle off cars, water and other surfaces. Such sunglasses are a practical application of which of the following physical principles?
Brewster’s law
Lenz’s law
Snell’s law.
Coulomb’s law

4. The period of geostationary artificial satellite is
24 hours
6 hours
12 hours
48 hours

5. A missile is launched with a velocity less than the escape velocity. The sum of its kinetic and potential energy is
Positive
Negative
Zero
may be positive or negative

6.There is no atmosphere on the moon because
it is closer to the earth.
it revolves round the earth
it gets light from the sun
the escape velocity of gas molecules is less than their root mean square velocity here.

7. When the planet comes nearer the sun moves
fast
slow
constant at every point
none of the above

8. The best colours for a Sun umbrella will be
white on top and black on inside
red on top and black on inside
black on top and white on inside
black on top and red on inside

9. In SONAR, we use
radio waves
audible sound waves
infrasonic waves
ultrasonic waves

10. A liquid is kept in a regular cylindrical vessel up to a certain height. If this vessel is replaced by another cylindrical vessel having half the area of cross-section of the bottom, the pressure on the bottom will
be increased to twice the earlier pressure
be reduced to one-fourth the earlier pressure
remain unaffected ;
be reduced to half the earlier pressure

11. The time period of a simple pendulum having a spherical wooden bob is 2 second. If the bob is replaced by a metallic one twice as heavy, the time period will be
more than 2 second
1 second
2 second
less than 1 second

12. The working principle of a washing machine is
Dialysis
Centrifugation
Reverse osmosis
Diffusion

13. The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as
Ultrasonic
Audible sounds
Infrasonic
Megasonics

14. A spherical ball made of steel when dropped in mercury container will
sink in mercury
will be on the surface of mercury
will be partly immersed in mercury
will dissolve in mercury

15. Two 220 V, 60 W bulbs are used for 5 hours a day for 10 days. If each unit (1 kilowatt hour) costs Rs. 3.50, find the total expense for it
Rs. 10.50
Rs. 38.50
Rs. 77.00
Rs. 21.00

16. Water drops cannot stick to the oily surface due to
surface tension
lack of adhesive force
water is lighter than oil
cannot mix each other

17. Energy in reflected light
does not depends on the angle of incidence
decreases with the increase in angle of incidence
increases with the increase in angle of incidence
becomes maximum for angle of incidence equal to 45 degree

18. The sound produced by a bat is -
Ultrasonic
Infrasonic
Audible
Subsonic

19. When a bar magnet is cut into two equal halves, the pole strength of each piece
Becomes zero
Remains the same
Becomes Half
Becomes Double

19. When a bar magnet is cut into two equal halves, the pole strength of each piece
Becomes zero
Remains the same
Becomes Half
Becomes Double

20. In a refrigerator, cooling is produced by
the evaporation of a volatile liquid
the sudden expansion of a compressed gas
the ice which deposits on the freezer
None of the above

This set of questions are contributed by Dr. S. K. Agrawalla, Lecturer, Dept of APAB
and the page is developed by our student Mr. Neelamadhaba Panigrahi, 2nd semester ICT and Ex-student, Miss Priyadarsini Mishra
Thank U all!!!