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Physical Chemistry -- Liquid State
11.
When water is in contact with a waxed glass surface, the angle of contact
will
- A.be zero
- B.be greater than 90o
- C.be less than 90o
- D.depend on the amount of wax
- Answer
- Report
Answer : [B]
12.
Surface tension does not vary with
- A.temperature
- B.vapour pressure
- C.the size of the surface
- D.concentration
- Answer
- Report
Answer : [C]
13.
Among the following molecules, which has the least surface tension?
- A.Benzene
- B.Acetic acid
- C.Diethyl ether
- D.Chlorobenzene
- Answer
- Report
Answer : [C]
14.
The film of a soap bubble has a
- A.small thickness and there is air both inside and outside the film
- B.small thickness and there is no air inside and outside the film
- C.large thickness and there is air only inside the film
- D.small thickness and there is air only outside the film
- Answer
- Report
Answer : [A]
15.
The pressure inside a soap bubble is
- A.greater than that outside by an amount 2S/R (S = surface tension and R = radius of bubble)
- B.less than that outside by an amount 4S/R
- C.greater than that outside by an amount 4S/R
- D.less than that outside by an amount 2S/R
- Answer
- Report
Answer : [C]
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