51. “Vegetables oil” is converted, into solid fat, by process, called?
(a) Respiration,
(b) Polymerization
(c) Photosynthesis
(d) Hydrogenation
answer
(d) Hydrogenation
52. The “heat in metal rod flows” by the process of?
(a) Radiation,
(b) Convection,
(c) Conduction,
(d) Magnetization,
answer
(c) Conduction,
53. “Coastal breeze” is produced, by?
(a) Convection,,
(b) Radiation,
(c) Conduction,
(d) Rain,
answer
(b) Radiation,
54. The “process of heat transfer ,from a hotter place to, a colder place by actual movement of the particles” of the medium, is known, as?
(a) Convection
(b) Radiation
(c) conduction
(d) evaporation
answer
(a) Convection
55. “Convection” occurs, only in?
(a) Solids and gasses
(b) Liquids and metals
(c) liquids and solids
(d) Liquids and Gasses
answer
(d) Liquids and Gasses
56. The “primary colours” of light?
(a) Red, green, yellow
(b) Red yellow, blue
(c) red, green, blue
(d) Green, yellow, blue
answer
(c) red, green, blue
57. When “light enters from, air into gasses” it’ bends?
(a) Towards normal
(b) But does not change the path
(c) Away from normal
(d) None of these
answer
(a) Towards normal
58. Sound “waves” are?
(a) Longitudinal
(b) Electromagnetic
(c) transverse
(d) X-rays
answer
(a) Longitudinal
59. A “human ear” hear sound only if its” frequency lies” between?
(a) 20-200 HZ
(b) 2-20 HZ
(c) 20-20,000 HZ
(d) 20-2000 HZ
answer
(c) 20-20,000 HZ
60. Charges, in “motion produces”?
(a) Current
(b) Voltage
(c) Circuit
(d) Energy
answer
(a) Current
