Question

(i) Surface tension
(ii) Density

Answer 1

density indicates mass per unit volume. Higher density means more mass and confined in a lesser volume

Answer 2

Explanation:

• Surface tension is pressure exerted upon a molecule of fluid present on the surface by its surrounding molecules.

High surface tension makes a fluid molecule become rounded.

A very "high surface tension" is also seen in mercury. Water also has a pretty high surface tension.

• Density of substance is described as mass of substance present in "one unit volume" of the substance.

This is mathematically expressed as mass per unit volume.