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181. When pressure is increased the melting point of ice
  A.  increases
  B.  does not change
  C.  depends on the impurities in the ice
  D.  decreases
     
   
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182. Rain drops fall from great height. Which among the following statements is true regarding it?
  A.  their velocity increases and they fall with same velocity on the earth
  B.  their velocity increases and they fall with different velocity on the earth
  C.  they fall with that ultimate velocity, which are different for different droplets
  D.  they fall with same ultimate velocity
     
   
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183. When the speed of car is doubled, then what will be the braking force of the car to stop it in the same distance?
  A.  two times
  B.  four times
  C.  half
  D.  one-fourth
     
   
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184. Two waves, each of amplitude 1.5mm and frequency 10Hz, are traveling in opposite direction with a speed of 20mm/s. The distance in mm between adjacent nodes is:
  A.  1.0
  B.  1.2
  C.  1.5
  D.  2.0
     
   
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185. A person standing on a railway platform listens to the whistles of arriving and departing trains. The whistle heard is
  A.  the same in both cases in all respects
  B.  of higher intensity when train arrives
  C.  of higher pitch when train arrives
  D.  of higher pitch when train departs
     
   
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186. Holography is a technique of
  A.  recording a permanent three dimensional photograph of a given single colour or a multicolour
  B.  recording a permanent thre dimensional multicolour photograph
  C.  recording a permanent three dimensional black and white photograph
  D.  recording a permanent, sharp two dimensional black and white or multicolur photograph
     
   
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187. The velocity of sound in moist air is more than in dry air because the moist air has
  A.  less pressure than dry air
  B.  less density than dry air
  C.  more pressure than dry air
  D.  more density than dry air
     
   
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188. The velocity of heat radiation in cacuum is
  A.  Equal to that of sound
  B.  Less than that of light
  C.  Greater than that of light
  D.  Equal to that of light
     
   
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189. Gamma rays can cause
  A.  Burning
  B.  Sneezing
  C.  Gene mutation
  D.  Fever
     
   
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190. The fundamental scientific principle in the operation of battery is:
  A.  Dissociation of electrolytes
  B.  Dialysis
  C.  Acid-base interaction
  D.  Oxidation-reduction
     
   
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