Advertisements
Advertisements
प्रश्न
Zone refining is based on the principle that ______.
विकल्प
impurities of low boiling metals can be separated by distillation.
impurities are more soluble in molten metal than in solid metal.
different components of a mixture are differently adsorbed on an adosrbent.
vapours of volatile compound can be decomposed in pure metal.
Advertisements
उत्तर
Zone refining is based on the principle that impurities are more soluble in molten metal than in solid metal.
APPEARS IN
संबंधित प्रश्न
Name the method used for the refining of Nickel metal.
Name the method of refining of metals such as Germanium.
What is the principle behind the zone refining of metals?
What is meant by the term “chromatography”?
Describe ‘froth floatation process’ for concentration of sulphide ore.
What happens when Silver is leached with NaCN in the presence of air?
Name the method of refining which is Used to obtain semiconductor of high purity.
In which of the following method of purification, metal is converted to its volatile compound which is decomposed to give pure metal?
(i) Heating with stream of carbon monoxide.
(ii) Heating with iodine.
(iii) Liquation.
(iv) Distillation.
Which method is used for refining Zr and Ti? Explain with equation.
Match the items of Column I with the items of Column II and assign the correct code:
| Column I | Column II |
| (A) Coloured bands | (1) Zone refining |
| (B) Impure metal to volatile complex | (2) Fractional distillation |
| (C) Purification of Ge and Si | (3) Mond Process |
| (D) Purification of mercury | (4) Chromatography |
| (5) Liquation |
Assertion: Zirconium can be purificed by Van Arkel method.
Reason: ZrI4 is volatile and decomposes at 1800 K.
Assertion: Zone refining method is very useful for producing semiconductors.
Reason: Semiconductors are of high purity.
Explain the following:
Vapour phase refining method is used for the purification of Ti.
Purification of crude metals by removing metallic and non-metallic impurities is known as ______ of metals.
Describe a method for refining nickel.
Describe a method for refining nickel.
Describe a method for refining nickel.
Describe a method for refining nickel.
Describe a method for refining nickel.
