55. Transformer works by
A. electromagnetic induction
B. electrostatics
C. gravitational force
D. nuclear force
56. Convex lens focal length 20 cm, power =
A. 5 D
B. 2 D
C. 0.05 D
D. 20 D
57. Escape velocity of Earth ≈
A. 11.2 km/s
B. 9.8 km/s
C. 7.9 km/s
D. 15 km/s
58. Heat transfer in solids mainly occurs by
A. conduction
B. convection
C. radiation
D. evaporation
59. SI unit of power =
A. joule
B. watt
C. newton
D. volt
60. Sound waves are
A. transverse
B. longitudinal
C. stationary
D. electromagnetic
BIOLOGY (71–90)
71. Basic unit of life =
A. tissue
B. organ
C. cell
D. organism
72. Photosynthesis occurs in
A. mitochondria
B. chloroplast
C. nucleus
D. ribosome
73. Pigment in photosynthesis =
A. chlorophyll
B. haemoglobin
C. carotene
D. melanin
74. Plants lose water via
A. diffusion
B. transpiration
C. respiration
D. excretion
75. Functional unit of kidney =
A. nephron
B. neuron
C. alveolus
D. villus
76. Movement of molecules high → low concentration =
A. osmosis
B. diffusion
C. active transport
D. filtration
77. Organ pumping blood =
A. lungs
B. liver
C. heart
D. kidney
78. Part of plant for photosynthesis =
A. root
B. leaf
C. stem
D. flower
79. Organisms making their own food =
A. consumers
B. autotrophs
C. decomposers
D. parasites
80. Nervous system coordinates via
A. hormones
B. nerve impulses
C. enzymes
D. antibodies
81. Evolution by natural selection proposed by
A. Gregor Mendel
B. Charles Darwin
C. Louis Pasteur
D. Robert Hooke
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A. electromagnetic induction
B. electrostatics
C. gravitational force
D. nuclear force
56. Convex lens focal length 20 cm, power =
A. 5 D
B. 2 D
C. 0.05 D
D. 20 D
57. Escape velocity of Earth ≈
A. 11.2 km/s
B. 9.8 km/s
C. 7.9 km/s
D. 15 km/s
58. Heat transfer in solids mainly occurs by
A. conduction
B. convection
C. radiation
D. evaporation
59. SI unit of power =
A. joule
B. watt
C. newton
D. volt
60. Sound waves are
A. transverse
B. longitudinal
C. stationary
D. electromagnetic
BIOLOGY (71–90)
71. Basic unit of life =
A. tissue
B. organ
C. cell
D. organism
72. Photosynthesis occurs in
A. mitochondria
B. chloroplast
C. nucleus
D. ribosome
73. Pigment in photosynthesis =
A. chlorophyll
B. haemoglobin
C. carotene
D. melanin
74. Plants lose water via
A. diffusion
B. transpiration
C. respiration
D. excretion
75. Functional unit of kidney =
A. nephron
B. neuron
C. alveolus
D. villus
76. Movement of molecules high → low concentration =
A. osmosis
B. diffusion
C. active transport
D. filtration
77. Organ pumping blood =
A. lungs
B. liver
C. heart
D. kidney
78. Part of plant for photosynthesis =
A. root
B. leaf
C. stem
D. flower
79. Organisms making their own food =
A. consumers
B. autotrophs
C. decomposers
D. parasites
80. Nervous system coordinates via
A. hormones
B. nerve impulses
C. enzymes
D. antibodies
81. Evolution by natural selection proposed by
A. Gregor Mendel
B. Charles Darwin
C. Louis Pasteur
D. Robert Hooke
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