Quiz  /  Surface tension Class 11 MCQ Questions With Answers

  • 1. 
    solid-liquid adhesive force is less than cohesive force, the angle of contact is

  • zero
  • 90
  • >>>  90
  • <<<  90

  • 2. 
    At critical temperature surface temperature is

  • more than 1
  • exactly 1
  • zero
  • infinity

  • 3. 
    With the rise in temperature, surface tension

  • increases
  • decreases
  • remains the same
  • becomes zero

  • 4. 
    The rise in the water level in a capillary tube of radius 0.07 cm when dipped vertically in a beaker containing water of surface tension 0.07 Nm−1Nm^{-1}Nm−1 is (g= 10ms−210ms^{-2}10ms−2 )

  • 2 cm
  • 4 cm
  • 1.5 cm
  • 3 cm

  • 5. 
    Surface tension is equalto

  • force/area
  • forcex are
  • force/length
  • None of these

  • 6. 
    At which of these temperatures is the viscosity of the fluid highest? (see graph)

  • 40 °C
  • 60 °C
  • 80 °C
  • 100 °C

  • 7. 
    What is the excess pressure inside a soap bubble of radius r

  • 4Tr\frac{4T}{r}r4T​
  • 2Tr\frac{2T}{r}r2T​
  • r4T\frac{r}{4T}4Tr​
  • r2T\frac{r}{2T}2Tr​

  • 8. 
    Work done in blowing a soap bubble of radius r is

  • 4πr2T4\pi r^2T4πr2T
  • 8πr2T8\pi r^2T8πr2T
  • 8πr3T3\frac{8\pi r^3T}{3}38πr3T​
  • 4πr3T3\frac{4\pi r^3T}{3}34πr3T​

  • 9. 
    Rain drops fall with constant velocity due to

  • buoyancy
  • gravity
  • viscosity
  • surface tension

  • 10. 
    Viscosity of fluid increases its speed will

  • increases
  • decreases
  • no change
  • All of above

  • 11. 
    In which situation is work not being done?

  • a 26 Kg wagon being pulled
  • a 30 Kg present being held above the floor
  • a 60 Kg weight being lifted up off the ground
  • a 13 Kg cat running across the floor

  • 12. 
    Antiseptic used in the cuts and wounds of human flesh have

  • low surface tension
  • high surface tension
  • low sticky
  • high viscosity

  • 13. 
    Have you ever seen an ______ walk on water?

  • insect
  • insurance
  • intern
  • taco

  • 14. 
    Surface tension is the phenomenon happens in

  • liquid
  • solid
  • gas
  • None of these

  • 15. 
    Water bugs can walk on water because of _______ tension.

  • surfing
  • surface
  • Santa Claus
  • San Diego

  • 16. 
    According to the picture from left to right, which of the answers is correct?

  • neurally buoyant, positively buoyant, negatively buoyant
  • negatively buoyant, neutrally buoyant, positively buoyant
  • positively buoyant, neutrally buoyant, negatively buoyant
  • neutrally buoyant, negatively buoyant, positively buoyant
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