Science Quiz - Question & Answers Set - 64

  • Question 3 :
  • Soap is used for washing clothes. Why ?

  • It reduces the surface tension of water so that water easily gets into the holes in cloths
  • It increases the surface tension of water so that water easily gets into the holes in cloths
  • It decreases the temperature of water and increases its velocity
  • It increases the temperature of water and increases its velocity
  • Question 6 :
  • Cutting is easy with the sharp end of a knife. It is due to:

  • The force acting on the sharp edge is more because the surface area is less
  • The force acting on the sharp edge is less because the surface area is less
  • The thrust on the edge is independent of the surface area
  • None of the above
Science Quiz - Question & Answers Set - 64
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