By Team Aakash Byju's | 20th December 2022

Which of the following methods is used for obtaining metals of very high purity?

 Distillation

 Zone Refining

Liquation

Electrolytic Refining

A

B

C

D

Detailed Explanation

The correct answer is  B) Zone Refining

Arrow

Zone refining is a method of purifying crystals in which a narrow region of crystal is molten, and this molten zone is moved along the crystal.

Noble-Gas Atmosphere

Induction Coil Heaters Moving as Shown

Molten Zone

Metal Rod

Zone Refining

The molten zone melts the impure solid at its front edge, leaving a trace of solidified pure metal.

Zone Movement

Melting Interface

Solid

Liquid

Freezing Interface

Solid

High-purity materials for transistors, such as semiconductors, are primarily prepared using this method.

Semi Conductor