63. Soap is prepared by boiling caustic soda with the
(a) Fat
(b) Glycerine
(c) Alcohol
(d) Kerosene oil
64. Two forces of 5 and 10 units act on a particle at right angles to each other. The net force which affects the particle is
(a) 5 √ units
(b) 50 units
(c) 15 units
(d) 5 units
65. Oology is the science which studies
(a) Bird’s eggs
(b) Birds and their environment
(c) Ecological set-up of insects
(d) Animals and plants life
66. The “universal donors” who can donate blood to people with any blood group have themselves the blood group
(a) A
(b) B
(c) AB
(d) O
67. Meningitis affects the
(a) Eyes
(b) Brain
(c) Skin
(d) None of these
68. Polio virus enters the body through
(a) The ingestion of contaminated water, food or drink
(b) Flies
(c) The snake-bite
(d) Mosquitoes
69. The functioning of a loud speaker depends upon its
(a) Size only
(b)Shape only
(c) Both size and shape
(d)Colour
70. A fuse wire in the main switch is used to
(a) Prevent an unduly high electric current from passing through a circuit
(b) Complete the circuit
(c) Convert AC into DC
(d) Prevent any leakage of current
71. The function of analgesic is to
(a) Relieve pain
(b) Cure tuberculosis
(c) Reduce the temperature of the body
(d) Act on the root cause of the pain
72. The biological reason for the view that excessive weight shortens the life span is that
(a) One requires more food
(b) One feels tired to carry the body weight
(c) One requires more energy
(d) Overweight people tend to suffer from serious conditions such as high blood pressure, shortness of breath, sleeplessness, heart trouble, kidney disease, diabetes, etc.