Question

Wax is coated on the inner wall of a
capillary tube and the tube is then dipped
water. Then, compared to the unwaxed
capillary, the angle of contact theta and the height h Upto which water rises change.
These changes are:
1)Theta increases and h also increases
2)Theta decreases and h also decreases
3)Theta increases and h decreases
4)Theta decreases and h increases

Answer 1

lkuklu

Answer 2

may the adhesion forces between the water molecules and glass molecules decreases so capillarity height will decrease.