Physics · JEE | MECHANICAL PROPERTIES OF FLUIDS

Consider the following statements regarding fluids and surface tension: (A) Surface tension is equal to the surface energy per unit area of the liquid interface. (B) The value of surface tension usually increases with an increase in temperature. (C) Mercury has an obtuse angle of contact with glass, whereas water has an acute angle of contact. (D) Capillary rise is inversely proportional to the radius of the capillary tube. Which of the above statements are correct?

1. A
   (A), (C) and (D) only
2. B
   (A), (B) and (C) only
3. C
   (B), (C) and (D) only
4. D
   and (D) only