Cupellation and Poling

Q.

Zone refining is a method to obtain:

1. Moderately pure metals

2. Ultrapure Al

3. Ultrapure metals

4. ultrapure oxides

Q.

Zone refining often yields 80-85% pure metal – True or False?

1. False

2. True

Q.

Zone refining is also known as fractional __

Q.

Zone refining is based on the principle of that the impurities tend to be in the melt than in the solid metal.

1. True

2. False