. What is Capillarity


Best Answer

It is a phenomenon by which a glass tube of very fine bore (called capillary tube) is dipped in a liquid (say water), the liquid immediately rises up due to surface tension. The narrower the tube, the greater is the height to which liquid rises. When the same capillary tube is placed in mercury, then it gets depressed below the outside level. The depression increases as the diameter of the tube decreases. Liquids which rise in capillary are called wetting liquids and which fall are called non-wetting liquids. Adhesive force is the attractive force between molecules of two  different material. 

 

 

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