Ans : (c)
91. Why is there a spluttering sound when water is sprinkled on hot oil?
       (a) Boiling point of the water is higher than that of oil
       (b) Boiling point of the oil is higher than that of water
       (c) Oil arid water do not mix
       (d) Oil and water combine to form a compound
Ans : (b)
92. Give the correct sequence of the increasing order of the energies of the radiations given below:
           1) Infrared rays
           2) Radiowaves
           3) Visible light
           4) Ultraviolet rays
       (a) 1, 2, 3, 4
       (b) 1, 3, 2, 4
       (c) 4, 3, 1, 2
       (d) 3, 4, 2, 1
Ans : (c)
93. Consider the following metals:
           1) Uranium
           2) Radium
           3) Plutonium
           Which of these are used in making nuclear weapons? [CDS 2004]
       (a)  1 and 2
       (b)  1, 2 and 3
       (c)  2 and 3
       (d)  1 and 3
Ans : (d)
94. The temperature of a body is an indicator of : [CDS 2004]
       (a) the total energy of the molecules of the body
       (b) the average energy of the molecules of the body
       (c) the total velocity of the molecules of the body
       (d) the average kinetic energy of the molecules of the body
Ans : (d)
95. Consider the following statements regarding electric fuse wire:
            1) It has low melting point.
            2) It has very high specific resistance.
            3) It is connected in parallel with the electric circuit.
           Which of the statements given above is/are correct? [NDA2004]
       (a)  1 only
       (b)  1 and 3
       (c)  1 and 2
       (d)  2 and 3
Ans : (c)
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