Question

the lower end of capillary tube touches a liquid having angle of contact 90 degree . the liquid
a) rise into tube
b) falls into tube
c) may rise Or falls inside the tube
d) neither rises nor fall inside the tube​

Answer 1

c

hope it's help you.....

Answer 2

The lower end of the capillary tube touches a liquid having an angle of contact 90 degrees. The liquid c) may rise Or falls inside the tube.

• The formula for computing the height of rise or fall is,
• h = 2Tcosθ/ρRg
• Where T is the tension, R is the radius, is the density and is the gravitational constant.
• Substitute the value of the angle in the above equation.
• h = 2Tcos 90°/ρRg
• h = 0
• As the height equals 0, thus, the liquid may rise or fall.