Question

Zone refining is a method to obtain:
A. Very high temperature
B. Ultra pure Al
C. Ultra pure metals
D. Ultra pure oxides

Answer 1

Hint: We know that, the zone refining is the process which is useful for the purification of crystalline solid. The zone refining is famous as zone melting or travelling melting zone process.

Complete step by step answer:
As we all know, the zone refining is that process which can be used for purifying the metals and removes all the impurities from it. It removes impurities from semiconducting elements; some of them are germanium, gallium and silicon. This is the method in which the thin region of the crystal of molten and this moves toward the crystal. This is done under the solidification process.
Now, let’s discuss it in detail.
In this refining process, the solubility of the present impurities in the respective metal is different in both molten and solid states. This process is generally termed as ultra-purification for the reason that its effect on impurity level in the metals decreases ppm-level. Thus, the zone refining is a method to obtain ultra pure metals. The diagram of zone refining is shown below.

Hence, the correct answer for this question is C that is the ultra pure metals.

Note:
The application of zone refining includes the inorganic compounds and organic compounds along with metals and semiconductors. It is used as a heat labile biological substituents in any aqueous solution to identify the power of crystallization.