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Viscosity

The surface t...

Question

The surface tension of mercury at normal temperature compared to that of water is

A

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B

less

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C

same

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D

more or less depending on the size of glass tube

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Solution

The correct option is A more
Mercury has a higher surface tension than water. This can be seen when looked at a drop of water and a drop of Mercury. The greater the surface tension of the liquid, the higher the bead of liquid will bow over. Surface tension is due to the different forces experienced by molecules in the interior of a liquid and those on the surface.

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Similar questions

Q. Mercury has an angle of contact equal to

140^{o}

with soda lime glass. A narrow tube of radius

1.00 m m

made of this glass is dipped in a trough containing mercury. By what amount does the mercury dip down in the tube relative to the liquid surface outside ? Surface tension of mercury at the temperature of the experiment is

0.465 N m^{- 1}

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= 13.6 \times 10^{3} k g m^{- 3}

Q. Mercury has an angle of contact equal to

140^{o}

with soda lime glass. A narrow tube of radius 1 mm made of this glass is dipped in a trough containing mercury. The surface tension of mercury at the temperature of the experiment is

0.465 N m^{- 1}

. The distance by which the mercury dip down in the tube relative to the mercury surface outside is: (Density of mercury =

13.6 \times 10^{3} k g m^{- 3}

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Q. Water rises to a height of

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3.42 c m

. Density of mercury is

13.6 g / c c

. The angle of contact for water in contact with glass is

0

and mercury in contact with glass is

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Q. Water rises to a height of

10 cm

in a certain capillary tube. Another identical tube when dipped in mercury, the level of mercury is depressed by

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