- Home
- General Science
Physical Chemistry -- Liquid State
1.
Calculate the radius of a capillary tube if water rises to a height of 12.5 cm within it, assuming the angle of contact between water and glass to be 0o (g = 10 m s2, p = 1 x 103 kg m -3).
- A.0.22 mm
- B.0.18 mm
- C.0.11 mm
- D.0.44 mm
- Answer
- Report
Answer : [C]
2.
Which of the following statements is correct?
- A.Surface tension is the energy per unit area of a free liquid surface.
- B.The unit of surface tension is N m -2 and its dimensions are MLoT-1.
- C.If a soap bubble is filled with more air, the pressure inside it increases.
- D.The angle of contact between a solid and a liquid is a property of the shape of the solid.
- Answer
- Report
Answer : [A]
3.
When a glass plate is immersed in mercury, the surface near the plate
- A.becomes concave
- B.is depressed
- C.is flat
- D.is first concave and then depressed
- Answer
- Report
Answer : [B]
4.
The dimensions MLoT-2 correspond to
- A.coefficient of viscosity
- B.moment of inertia
- C.surface tension
- D.surface area
- Answer
- Report
Answer : [C]
5.
There is a depression in the surface of the liquid in a capillary when
- A.the cohesive force is smaller than the adhesive force
- B.the cohesive force is greater than the adhesive force
- C.there is an equilibrium between the cohesive and the adhesive force
- D.none of these is true
- Answer
- Report
Answer : [B]
|
|
||||||||||||||||||||||||||||
