# Practice Test: General Science- 5 Notes | Study Science & Technology for UPSC CSE - UPSC

## UPSC: Practice Test: General Science- 5 Notes | Study Science & Technology for UPSC CSE - UPSC

The document Practice Test: General Science- 5 Notes | Study Science & Technology for UPSC CSE - UPSC is a part of the UPSC Course Science & Technology for UPSC CSE.
All you need of UPSC at this link: UPSC

Question 1. The mass of a body is different from its weight because________

Answer: mass is a measure of the quantity of matter whereas weight is a force

Question 2. Let WP and WE be the weights of a body at the north pole and at the equator respectively. If the earth were not rotating then WP ________

Answer: would remain unchanged

Question 3. A person weighs more in a lift, which is________

Question 4. A ball tied with a string to a rotating shaft revolves at uniform speed. As the shaft is suddenly brought to rest the string starts getting round the shaft with the angular velocity of the ball________

Question 5. One finds it more difficult to walk on ice than on a concrete road because________

Answer: the friction between the ice and the feet is less than that between the concrete and the feet

Question 6. It is easier to roll a barrel than to pull it because________

Answer: rolling friction is much less than sliding friction

Question 7. A sheet of paper can be pulled out quickly from under a glass of water without spilling the water. This phenomenon illustrates________

Question 8. A horse pulling a tanga moves forward due to the force exerted by________

Answer: the ground on the horse’s feet

Question 9. When the velocity of a body is doubled, its momentum is________

Question 10. The work done in holding a weight of 20 kg at a height of 1 m above the ground is________

Question 11. Ther Universal Law of Gravitation was propounded by________

Question 12. Winding a watch is actually the process of storing________

Question 13. Conservation of energy means that________

Answer: energy can neither be created nor

Question 14. The period of revolution of a geostationary satellite is________

Question 15. If an apple is released from an orbiting spaceship, it will move________

Answer: along with the spaceship at the same speed

Question 16. A steel ball floats on mercury because________

Answer: the density of mercury is higher than that of steel

Question 17. The atmosphere exerts enormous pressure on us. But we do not feel it because________

Answer: our blood exerts a pressure slightly more than that of the atmosphere

Question 18. In a barometer, mercury is preferred over water because________

Answer:  mercury has high density and low vapour pressue

Question 19. A stone is thrown into a deep lake. As it sinks deeper and deeper into the water, the upthrust acting on it________

Question 20. Raindrops are spherical due to________

Question 21. On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because________

Answer: cohesion of mercury is greater than its adhesion with glass

Question 22. The swing of a spinning cricket ball in the air can be explained on the basis of________

Question 23. In a sprayer the liquid rises in the tube due to________

Answer: lower pressure at the upper end

Question 24. A football bounces when it falls on the ground because________

Answer: of its property of elasticity

Question 25. The science dealing with the study of phenomena at very low temperatures is known as________

Question 26. In cold countries alcohol is preferred to mercury as a thermometric liquid because________

Answer:  Alcohol has a very low freezing point

Question 27. When a certain mass of liquid is heated in a glass flask the liquid level________

Answer: Falls at fir st and then starts rising

Question 28. When a cube of ice floating on water in a beaker melts, the level of water in the beaker________

Answer: Remains the same

Question 29. If water in a lake were to behave like other liquids, then in extremely cold weather it would freeze________

Answer: from bottom to top

Question 30. The tem perature of the t op of a frozen lake is________15°C. What is the temperature of the water in the lake in contact with the ice layer?

Question 31. Fish can survive inside a frozen lake because________

Answer:  water near the bottom does not freeze

Question 32. When w ater is c ooled fr om 8°C t o 0°C its volume________

Answer:  decreases up to 4° C and then increases

Question 33. The best conductor of heat among liquids is________

Question 34. A thermostat is a device for________

Question 35. Using the codes GH for good conductor of heat, BH for bad conductor of heat, GE for good conductor of electricity and BE for bad conductor of electricity, mica can be classified as:

Answer: GH and BE

Question 36. A pyrex tumbler does not crack when hot water is poured into it because pyrex________

Answer: does not expand much on heating

Question 37. The freezer in a refrigerator is fitted near the top________

Answer: so that it can cool the whole interior by setting up convection currents

Question 38. By what process is heat transmitted from the filament of an evacuated electric bulb of the glass________?

Question 39. Hot coffee is poured simultaneously in four metallic tumblers painted outside with different types of paints. After some time, the coffee will be found coldest in the tumbler painted________

Question 40. Light coloured clothes are preferred in summer because________

Answer: light colours are poor absorbers of heat

Question 41. By which methods could a cup of hot coffee lose heat if placed on a metal table in a room________

Answer: conducti on, convec -tion, radiation and evaporation

Question 42. In a cup, tea cools from 99°C to 80°C in exactly one minute. It will cool from 70°C to 60°C in________

Answer: more than one minute

Question 43. A little ether on the palm gives a cooling sensation because ether________

Question 44. Scalding with steam is more severe than scalding by boilding water because________

Answer: Steam contai ns more energy than boiling water

Question 45. One feels cold after a dip in sea water due to________

Answer: the evaporation of water on the body

Question 46. The surface of water in a pond remains cool even on a hot day because________

Answer: water evaporates at the surface and evaporation cause cooling

Question 47. The boiling point of water depends on________

Question 48. The cover of a solar cooker is made of glass because________

Answer: because glass allows sunlight into the container but does not allow heat radiation out of it

Question 49. Light waves are different from sound waves in that________

Answer: light waves are electromagnetic but sound waves are not

Question 50. Delhi radio station broadcasts at a frequency of 819 kHz. What is the wavelength of the radio-waves?

Answer: 3.66 x 102 m

The document Practice Test: General Science- 5 Notes | Study Science & Technology for UPSC CSE - UPSC is a part of the UPSC Course Science & Technology for UPSC CSE.
All you need of UPSC at this link: UPSC
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