Surface and Interfacial Phenomena

Question 1

Define Interface

Answer 1

The boundary between 2 phases. e.g: b/wn Oil and Water

Question 2

Define Surface

Answer 2

Surface is a special type of Interface. (when one of the phases is gas/vapour). e.g: the surface of a cup of water

Question 3

Define Surface tension

Answer 3

‘The force acting along the surface’

Question 4

In the bulk liquid, molecules experience equal attraction forces from all directions. TRUE OR FALSE.

Answer 4

TRUE

Question 5

At the surface of a liquid, molecules experience net inward attraction forces. This creates surface tension. TRUE OR FALSE

Answer 5

TRUE

Question 6

Work cannot be converted into energy. TRUE OR FALSE. If FALSE, correct the statement

Answer 6

FALSE. Work CA be converted into energy and vice versa

Question 7

After work is done to a system, the energy level of the system increase. TRUE OR FALSE

Answer 7

TRUE