Question

Which of the following is associated with liquid only and not for glasses?
A) Pressure
B) Volume
C) Density
D) Surface tension

Answer 1

Hint : A liquid can flow in any direction and can take the shape of any container it is put in. A gas can completely occupy any container it is put in.

Complete step by step answer
To answer this question, let us discuss all the properties given in the options.
The pressure is associated with both liquids and gases. It is the average force that is exerted per unit area by the substance. For a liquid, the pressure increases with increasing depth inside the liquid. For a gas, the pressure is uniform inside a container it is stored in. It can be thought of as the force exerted by the gas molecules when they interact with the falls per unit area of the wall.
Volume is also associated with both liquids and gases. Liquids can occupy any kind of volume as can gases. Though, liquids will usually have a fixed volume while gases can occupy any amount of volume given to us.
Density is also associated with both liquid and gases. It is the ratio of the mass of the liquid or the gas to the volume of the liquid or the gas. As discussed before, the volume of a liquid will be constant but the volume of a gas will be equal to the container it is stored in. Gases are very less dense compared to liquids.
Surface tension is only associated with liquids. It can be thought of as the energy possessed by the free surface of liquids due to the property of liquid molecules to be attracted towards each other. Gases do not have this property.
Hence option (D) is the correct choice.

Note
Liquids are very much similar to gases however there are some differences such as the property of surface tension that liquids have but gases don’t as we discussed above. Gases are also easily compressible however liquids are not.