13) Which is a process in which cations or anions are captured from solutions, with the help of artificial polymeric resins, to produce de-ionised water.

14) Water-break Test is used to determine the _____ of the surface of the work piece.

15) One gram equivalent = _____ Ampere hours

16) Which is a technique of selective plating on a particular area of component using portable equipment and anodes, usually surrounded by an absorbent material

17) Which of an element is a measure of its combining power with other atoms, when it forms chemical compounds or molecules