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PHYSICS MCQs

Total Questions : 3767 | Page 26 of 377 pages
Question 251. Which of the following is not a property of heavy water ?
  1.    Boiling point of heavy water is lower than that or ordinary water
  2.    Density of heavy water is higher than that of ordinary water
  3.    Freezing point of heavy water is higher than that of ordinary water
  4.    It produces corrosion
 Discuss Question
Answer: Option A. -> Boiling point of heavy water is lower than that or ordinary water
Question 252. Which of the following liquids is most viscous?
  1.    Oil
  2.    Milk
  3.    Water
  4.    Petrol
 Discuss Question
Answer: Option A. -> Oil
Question 253. Small bubbles are perfectly spherical because of
  1.    Gravity
  2.    Pressure
  3.    Viscosity
  4.    Surface tension
 Discuss Question
Answer: Option D. -> Surface tension
Question 254. Pitot tube is used to measure
  1.    Static pressure
  2.    Velocity at stagnation point
  3.    Stagnation pressure
  4.    Dynamic pressure
 Discuss Question
Answer: Option C. -> Stagnation pressure
Question 255. A spherical ball made of steel when dropped in mercury container
  1.    Sink in mercury
  2.    Will be on the surface of mercury
  3.    Will be partly immersed mercury
  4.    Will dissolve in mercury
 Discuss Question
Answer: Option B. -> Will be on the surface of mercury
Question 256. If cream is removed from milk, its density
  1.    Increases
  2.    Decreases
  3.    Remains the same
  4.    May increase or decrease
 Discuss Question
Answer: Option A. -> Increases
Question 257. A falling drop of rain water acquires the spherical shape due to
  1.    Viscosity
  2.    Surface Tension
  3.    Atmospheric pressure
  4.    Gravitational force
 Discuss Question
Answer: Option B. -> Surface Tension
Question 258. Why the needle of iron swims on water surface when it is kept gently ?
  1.    It will remain under the water, when it will displace more water than its weight
  2.    The density of needle is less than that of water
  3.    Due to surface tension
  4.    Due to its shape
 Discuss Question
Answer: Option C. -> Due to surface tension
Question 259. Rise of oil a wick is due to
  1.    Density of the oil
  2.    Viscosity of the oil
  3.    Surface tension of the oil
  4.    Pressure of the oil
 Discuss Question
Answer: Option C. -> Surface tension of the oil
Question 260. An oil drop spreads over water because
  1.    Oil is lighter than water
  2.    Oil is more viscous
  3.    Oil does not mix with water
  4.    water has a higher surface tension
 Discuss Question
Answer: Option D. -> water has a higher surface tension

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