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PHYSICS MCQs

Total Questions : 3767 | Page 24 of 377 pages
Question 231. If an ordinary glass tube and a glass capillary tube are both dipped in a beaker of water, water rises in
  1.    Both
  2.    Only the glass tube
  3.    Only the capillary tube
  4.    Neither
 Discuss Question
Answer: Option A. -> Both
Question 232. Surface tension in a liquid is due to :
  1.    Adhesive force betweenmolecules
  2.    Cohesive force between molecules
  3.    Gravitational force between molecules
  4.    Electrical force between molecules.
 Discuss Question
Answer: Option B. -> Cohesive force between molecules
Question 233. A boat loaded with rocks floats in the middle of a swimming pool. A man in the boat throws the rocks overboard. The level of water in the pool will
  1.    Increase
  2.    Decrease
  3.    Remains the same
  4.    First decrease and then increase
 Discuss Question
Answer: Option B. -> Decrease
Question 234. The oil in the wick of an oil lamp rises up due to:
  1.    Capillary action
  2.    Low viscosity of oil
  3.    Gravitational force
  4.    Pressure difference
 Discuss Question
Answer: Option A. -> Capillary action
Question 235. Fog is an example of
  1.    Gas dispersed in gas
  2.    Liquid dispersed in gas
  3.    Solid dispersed in gas
  4.    Solid dispersed in liquid
 Discuss Question
Answer: Option B. -> Liquid dispersed in gas
Question 236. If the diameter of a capillary is doubled, then the rise of water in it will be
  1.    Two times
  2.    Half
  3.    Four times
  4.    No change
 Discuss Question
Answer: Option B. -> Half
Question 237. A needle or a pin floats on the surface of water because of
  1.    Surface tension
  2.    Surface energy
  3.    Viscosity
  4.    Adhesive force
 Discuss Question
Answer: Option A. -> Surface tension
Question 238. Materials for rain proof coats and tents owe their water proof properties to
  1.    Surface tension
  2.    Viscosity
  3.    Specific gravity
  4.    Elasticity
 Discuss Question
Answer: Option A. -> Surface tension
Question 239. Water drops cannot stick to the oily surface due to
  1.    Lack of adhesive force
  2.    Surface tension
  3.    Cannot mix each other
  4.    Water is lighter than oil
 Discuss Question
Answer: Option B. -> Surface tension
Question 240. Soap bubble attains spherical shape due to ________
  1.    Inertia
  2.    Pressure
  3.    Surface tension
  4.    Viscosity
 Discuss Question
Answer: Option C. -> Surface tension

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