Quiznetik

Biology-Physics-Chemistry (GK) | Set 2

1. Random Movement of particles was discovered by

Correct : A. Robert Brown

2. Scattering of light by colloidal particles is known as

Correct : A. Tyndall effect

3. Which of the following non-metals occur in liquid form at room temperature?

Correct : A. bromine

4. Brass is an example of a ______

Correct : B. homogenous mixture

5. Which of the following is not a noble gas?

Correct : D. hydrogen

6. Which of the following acids is present in sour milk?

Correct : B. lactic acid

7. Which of the following acids is called the king of the acids?

Correct : D. sulphuric acid

8. The sharp pain caused by the sting of an ant is due to

Correct : C. formic acid

9. Vitamin C is an organic acid known as

Correct : A. ascorbic acid

10. Soaps are sodium salts of

Correct : B. fatty acids

11. Sodium bicarbonate is also known as

Correct : B. baking soda

12. Which of the following is not a property of acids?

Correct : C. acids turn red litmus blue

13. Which of the following acid is used in fire extinguishers?

Correct : B. sulphuric acid

14. Which of the following acid is used by goldsmiths for cleaning gold and silver ornaments?

Correct : C. HNO3

15. Which order of relative size amongst the following is incorrect?

Correct : C. Mg > Al < Na

16. Which one of the following has the smallest size?

Correct : D. Al+3

17. Which of the following is an example of fossil fuel?

Correct : C. natural gas

18. When steam is passed over hot coke, it produces

Correct : B. synthesis gas

19. Producer gas is a mixture of

Correct : A. carbon monoxide and nitrogen gas

20. Water gas consists of

Correct : B. a mixture of carbon monoxide and hydrogen

21. The gas used in the welding and cutting of metals is

Correct : C. ethyne

22. Coal with largest C content is

Correct : A. anthracite

23. An allotropic form of carbon used for cutting and drilling is

Correct : D. diamond

24. Cinnabar is an ore of

Correct : C. Hg

25. Which of them is not an ore of silver?

Correct : D. None of these

26. Which of the following alloys contains Tin?

Correct : B. solder

27. An amalgam of metal has which other element?

Correct : D. Hg

28. Gold is alloyed with which metal to make it harder?

Correct : A. Cu

29. The most abundant element in the universe is

Correct : B. oxygen

30. The most abundant metal on the earth is

Correct : C. aluminium

31. Aluminium is extracted from

Correct : B. bauxite

32. Metallurgy is the process of

Correct : A. extracting metals from the Ore

33. A metal, which melts on the palm

Correct : B. sodium

34. The process of protecting iron by coating with Zinc.

Correct : B. galvanising

35. A lustrous non-metal is

Correct : B. iodine

36. Sodium is a

Correct : A. silvery white and very soft metal

37. Which of the following is used for making magnets?

Correct : D. alnico

38. What should be added to pure iron to make stainless steel?

Correct : D. chromium and nickel

39. The red or Orange coating that forms on the surface of iron when exposed to air and moisture for some time is called

Correct : C. rust

40. The tip of the lead pencil is made of

Correct : B. graphite

41. The most abundant element in the sun’s atmosphere is

Correct : C. hydrogen

42. Ordinary glass is a mixture of

Correct : A. sodium silicate, Calcium silicate

43. Glass used for making wind screens of automobiles is

Correct : C. safety glass

44. Annealing is done to

Correct : C. decrease brittleness

45. Steel is preferred over iron in construction of ships because

Correct : C. steel does not rust

46. The carbon content in steel is

Correct : C. 0.1 – 1.5%

47. Permanent magnets can be made from

Correct : D. wrought iron

48. The main constituents of cement are:

Correct : A. calcium oxide, silicon dioxide, Aluminium oxide

49. A thick paste of cement, sand and water is called

Correct : B. mortar

50. The process of making soap by the hydrolysis of fats and oils with alkalis is called

Correct : B. saponification

51. The soap can be hardened by

Correct : A. adding sodium carbonate or sodium silicate during its manufacture

52. Bleaching powder is

Correct : B. CaOCl2

53. Plaster of Paris is obtained by heating

Correct : A. gypsum

54. The common name of sodium bicarbonate is

Correct : B. baking powder

55. Slaked lime reacts with chlorine to give

Correct : C. bleaching powder

56. The main constituent of cement is

Correct : A. SiO2

57. The real bleaching agent present in bleaching powder is

Correct : A. chlorine

58. Cake does not taste bitter due to presence of

Correct : B. tartaric acid

59. What is obtained on adding lime to H2O?

Correct : C. slaked lime

60. Which of the following is different from others?

Correct : D. time

61. The amount of substance in the SI system of units is represented by

Correct : B. mole

62. The SI unit of temperature is

Correct : A. Kelvin

63. The National Physical Laboratory is situated at

Correct : B. New Delhi

64. The SI unit of electric current is

Correct : A. ampere

65. How many fundamental units are present in the SI system of units?

Correct : C. 7

66. Which of the following physical quantities is different from others?

Correct : D. average velocity

67. The unit for the rate of change of velocity will be

Correct : B. m/s2

68. The velocity of a body at rest is always

Correct : C. zero

69. Impulse is

Correct : B. a vector quantity

70. The weight of a body would not be zero

Correct : D. on a frictionless surface

71. A man is standing on a boat in still water. If he walks towards the shore the boat will

Correct : A. move away from the shore

72. If action and reaction were to act on the same body,

Correct : C. both (a) and (b) are correct

73. The combined effect of mass and velocity is taken into account by a physical quantity called

Correct : C. momentum

74. Momentum is a measure of

Correct : C. quantity of motion

75. A rocket works on the

Correct : C. third law of motion

76. When a bicycle travels on a rough surface, its speed

Correct : B. decreases

77. It is difficult to walk on ice because of

Correct : A. absence of friction

78. The law which defines force is

Correct : B. Newton’s first law of motion

79. Friction between any two objects is due to

Correct : D. irregularities on the surfaces

80. Pascal is the unit for

Correct : A. pressure

81. The mercury barometer was invented by

Correct : C. Torricelli

82. The buoyant force depends on

Correct : C. density of liquid

83. The hot air balloon rises because it is

Correct : B. less dense

84. A boat full of iron nails is floating on water in a lake. When the iron nails are removed, the water level

Correct : B. falls

85. An ice cube is floating in a glass of water. What happens to the water level when the ice melts?

Correct : C. remains same

86. The branch of physics which deals with the study of fluids in motion is called

Correct : C. hydrodynamics

87. Pressure is a

Correct : A. scalar quantity

88. The upward force acting on the body immersed in a fluid is called

Correct : B. buoyant force

89. Work done upon a body is

Correct : B. a scalar quantity

90. the flowing water of a river possesses ______ energy.

Correct : D. kinetic

91. The unit of power is

Correct : D. watt

92. A bird flying in the sky has

Correct : D. both K.E. and P.E.

93. In summer, the clocks

Correct : A. become slow

94. Therm is the unit of

Correct : A. heat

95. Heat flows as a result of difference of

Correct : A. temperatures

96. The first thermometer was developed by

Correct : C. Galileo

97. Soda bottles are made of thick glass so that they can withstand the

Correct : A. pressure in summer

98. Evaporation is the process of changing liquid into vapour

Correct : D. below its boiling point

99. The period of pendulum depends upon

Correct : B. length

100. Potential energy of the bob is maximum

Correct : B. at the extreme position