Science & Technology

73. One nanometer is equal to A.     10-6m    B.     10-8m C.     10-9m    D.     10-5m Answer & […]

67. Identify the vector quantity from the following A.     Heat B.     Angular momentum C.     Time D.   

67. Identify the vector quantity from the following A.     Heat B.     Angular momentum C.     Time D.   

61. Solar eclipse will take place when A.     the sun is between the moon and the earth B.   

55. Supersonic plane fly with the speed A.     less than the speed of sound B.     of sound C.

55. Supersonic plane fly with the speed A.     less than the speed of sound B.     of sound C.

43. Light travels at the fastest speed in A.     glass    B.     water C.     hydrogen    D.     vacuum

43. Light travels at the fastest speed in A.     glass    B.     water C.     hydrogen    D.     vacuum

37. Inside an aeroplane, flying at a high altitude, A.     the pressure is the same as that outside B.

31. On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of

25. Lux is the SI unit of A.     intensity of illumination B.     luminous efficiency C.     luminous flux

19. out of the following, which is not emitted by radioactive substance? A.     Electrons B.     Electromagnetic radiations C.

13. Metals are good conductors of electricity because A.     they contain free electrons B.     the atoms are lightly

7. Light year is a unit of A.     time    B.     distance C.     light    D.     intensity of

1. Radiocarbon is produced in the atmosphere as a result of A.     collision between fast neutrons and nitrogen nuclei

61. Which of the following metals remain in liquid for under normal conditions? A.     Radium    B.     Zinc C.

56. Water is a good solvent of ionic salts because A.     it has a high specific heat B.   

51. Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the

46. In fireworks, the green flame is produced because of A.     sodium    B.     barium C.     mercury    D.

41. What is laughing gas? A.     Nitrous Oxide B.     Carbon monoxide C.     Sulphur dioxide D.     Hydrogen

36. Which of the following was to be discovered first in the chromospheres of the sun? A.     Krypton    B.

31. Potassium nitrate is used in A.     medicine    B.     fertiliser C.     salt    D.     glass Answer &

26. The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the

21. When an iron nail gets rusted, iron oxide is formed A.     without any change in the weight of

21. When an iron nail gets rusted, iron oxide is formed A.     without any change in the weight of