General Science One Liner Questions

General Science One Liner Questions: We have picked up the most important question for you to practice and prepare for govt exam. Here, you can get General Science One Liner Questions . There are more chapters on this topics. We also prepare more One Liner Questions and answers in different topics or syllabus.

General Science One Liner Questions

1) Velocity of light is maximum in
Answer: Vacuum

2) The focal length of a plane mirror is
Answer: Infinity

3) The reflector of a search light is a
Answer: Concave mirror

4) The image formed by a plane mirror is ….
Answer: Real

5) The image formed by a convex mirror is :
Answer: erect and diminished

6) The weight of an object on the moon is equal to ………… of
its weight on the earth –
Answer: 1/6th

7) Soap bubble attains spherical shape due to ……. .
Answer: Surface tension

8) When the velocity of a body is doubled
Answer: its momentum is doubled

9) The energy processed by a body due to its change in
position or shape is called
Answer: potential energy

10) What is the point on the liver which does not move called?
Answer: Fulcrum

11) Soaps clean surfaces on the principle based on
Answer: Surface tension

12) On which principles does the hydraulic lift works ?
Answer: Pascal’s law

13) Who among the following scientist discovered the
law of Floatation ?
Answer: Archimedes

14) Density is the ratio of :
Answer: Volume/Mass

15) The working principle of a Washing Machine is :
Answer: Centrifugation

16) The normal temperature of human body is
Answer: 37 Degree Celsius

17) What is the process of conversion of solid state
directly to gaseous state called ?
Answer: Sublimation

18) Who among the following gave first the
experimental value of G ?
Answer: Cavendish

19) Kilowatt is a unit to measure –
Answer: Power

20) A barometer is used to measure which one of the
following ?
Answer: atmospheric pressure

21) The temperature at which both the Fahrenheit and
Centigrade scales have the same value is
Answer: -40 degrees

22) The SI unit of temperature is
Answer: Kelvin

23) Who invented the Centigrade scale ?
Answer: Anders Celsius

24) Who among the following scientist invented the mercury
thermometer ?
Answer: D.G. Fahrenheit

25) The normal temperature of human body is

Ans: 37 Degree Celsius

26) What is the S.I. unit of pressure :
Answer: Pascal

27) One light year is approximately equal to :
Answer: 10 to the power 16 m.

28) Light year is a unit of
Answer: Distance

29) Ampere is the unit of :
Answer: current electricity

30) Definition of force comes from Newton’s –
Answer: first law of motion

31) Golden view of sea Shell is due to –
Answer: Polarization

32) Dr. C.V. Raman was awarded Nobel Prize for his work
connected with which of following phenomenon of
radiation ?
Answer: Scattering

33) Which famous scientist was the first to look at the night
sky through a telescope ?
Answer: Galileo

34) The head mirror used by E.N.T. doctors is –
Answer: Concave

35) A water tank appears shallower when it is viewed from
top due to –
Answer: Refraction

36) Dioptre is the unit of –
Answer: power of a lens

37) Who discover the color photography –
Answer: James Clerk Maxwel

38) How many image can a man see if he stands
between two plane mirrors inclined at an angle of
60 degrees ?
Answer: 5

39) Camberts, law is related to
Answer: illumination

40) Electron microscope was invented by
Answer: Knoll and Ruska

41)Transformer is a device to convert –
Answer: Low voltage A.C. into high voltage A.C.

42) Unit of Electrical power is –
Answer: Watt

43) Instrument used to store the electric charge is
known as –
Answer: Capacitor

44) Conversion of chemical energy into electrical
energy occur in
Answer: Battery

45) Permanent magnet can be made from –
Answer: Cobalt

46) ‘mho’ is the unit of
Answer: Conductivity

47) In wind power, which form of energy is converted into
electrical energy ?
Answer: Kinetic

48) Electric Motor converts ……… energy to mechanical
energy.
Answer: Electrical

48) Electric current is measured using which of the following
instrument ?
Answer: Ammeter

49) Who invented the electric tram ?
Answer: Fyodor Pirotsky

50) What constitutes current in a metal wire ?
Answer: electrons

51) Einstein was honored with Nobel Prize for
Answer: Photoelectric Effect

52) The least penetrating power ray is
Answer: œ – Ray

53) Who discovered proton ?
Answer: Ernest Rutherford

54) Photovoltaic cells are
Answer: Solar cells

55) The fuel used in nuclear power plant is
Answer: U – 235

56) Radioactivity is measured by –
Answer: GM counter

57) Which is the second most abundant element in the
universe ?
Answer: Helium

58) Potassium is a chemical element with the symbol –
Answer: K

59) What is the symbol element of Lead ?
Answer: Pb

59) Salt is obtained from Seawater by which process ?
Answer: Evaporation

60) The most abundant elements is
Answer: Nitrogen

61) Oxygen and ozone are –
Answer: allotropes

62) Neutron was discovered by –
Answer: Chadwick

63) Who discovered electron ?
Answer: J.J. Thomson

64) How many types of isotopes does scandium have ?
Answer: 13

65) Atoms are composed of –
Answer: Electrons and nuclei

66) The three basic components of an atom are –
Answer: Protons, neutrons and electrons

67) The word ‘insolation’ means –
Answer: Incoming solar radiation

68) The heaviest naturally occurring elements is –
Answer: Uranium

69) Cobalt – 60 is commonly used in radiation therapy
because it emits –
Answer: Gamma rays

70) The phenomenon of radioactivity was discovered in
1898 A.D. by –
Answer: Henri Becquerel

71) What was the fissionable material used in the bombs
dropped at Nagasaki (Japan) in the year 1945 ?
Answer: Plutonium

72) Heavy water is used as a coolant in nuclear reactors.
Heavy water is
Answer: Water containing heavy isotope of hydrogen

73) Nuclear fission is caused by the impact of –
Answer: Neutrons

74) What is neutron ?
Answer: Particle released during radioactivity

75) S.I. unit of radioactivity is
Answer: Becquerel

76) Which one of the following is used in the treatment of
blood cancer ?
Answer: Phosphorus – 32

77) Movement of outer electrons in the inner orbits of an
atom produces
Answer: X – ray

78) What is the name of the acid in grapes ?
Answer: Tartaric acid

79) Sulphuric acid is –
Answer: Dibasic

80)The gas evolved when sodium carbonate reacts with
hydrochloric acid is –
Answer: Carbon dioxide

81) The element common to all acids is –
Answer: Hydrogen

82) At what pH value tooth starts to decay ?
Answer: 5.5

83) The pH value of water is –
Answer: 7

84) The pH of lemon juice is expected to be –
Answer: less than 7

85) The purest form of water in nature is
Answer: Rain water

86) A solution of washing soda in water is –
Answer: Alkaline

87) If we add salt to pure water, its boiling point will
Answer: Increase

88) A solution is a –
Answer: A homogeneous mixture of two or more
substances

89) When a gas is turned into a liquid, the process is
called –
Answer: Condensation

90) Galvanised iron sheets have a coating of –
Answer: Zinc

91) What is the process of rust forming on iron called ?
Answer: Rusting

92) The most extensive use of molasses after
fragmentation is for producing
Answer: Ethanol

93) Plaster of paris is made from –
Answer: Gypsum

94) Which metal is earlier called Wolfram ?
Answer: Tungsten

95) The metal used for making air crafts and rockets is
Answer: Aluminium

96) What are the main components of Bronze Alloy ?
Answer: Copper and Tin

97) The chemical name of ‘Hypo’ commonly used in
photography is
Answer: Sodium thiosulphate

98) Diamond is an allotropic form of –
Answer : Carbon

99) Chlorophyll and Hemoglobin respectively contain
Answer: Mg and Fe

100) Which is the most reactive metal ?
Answer: Potassium

General Science One Liner Questions

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