Question

Pure Boron and silicon can be obtained by?
Electrolytic refining
Vapour phase refining
Zone refining
Monds process ​

Answer 1

Answer:

• They can be obtained by Zone refining process.

Explanation:

$\rule{300}{1.5}$

Most Semi conductors in the periodic table are Purified by zone refining process. As Boron and silicon are semiconductors they are also refined by this process.

So, Pure Boron and silicon can be obtained by Zone refining.

Extra Information:

• Germanium, Gallium are also purified by zone refining process.

• Lead, Tin are purified by liquation process.

• Zinc, Cadmium, Mercury are purified by Distillation process.

• Copper is purified by Poling & Electrorefining process.

• Nickel and Zirconium are purified by vapour phase refining process.

$\rule{300}{1.5}$

Answer 2

Answer:-

Pure Boron and silicon can be obtained by Zone Refining....

Explanation:-

Zone refining:

• This method is based on the principle that impurities are more soluble in the molten state of metal than in the solid state.

• In the process of zone refining, a circular mobile heater is fixed at one end of a rod of impure metal.

• As the heater moves, the molten zone of the rod also moves along with it. As a result, pure metal crystallizes out of the melt and the impurities pass to the adjacent molten zone.

• This process is repeated several times, which leads to the segregation of impurities at one end of the rod.

• Then, the end with the impurities is cut off.

• Silicon, boron, gallium, indium etc. can be purified by this process.