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Explain the following: Vapour phase refining method is used for the purification of Ti. - Chemistry

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प्रश्न

Explain the following:

Vapour phase refining method is used for the purification of Ti.

दीर्घउत्तर
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उत्तर

In the process of vapour refining an impure metal is treated with a suitable reagent to form volatile compound which is decomposed at high temperature to get pure metal. Here, Ti can form volatile compound (I1I4) with the iodine and the compound is easily decomposable to give extra pure Ti. So, the recovery is easy.

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पाठ 6: General Principle and Processes of Isolation of Elements - Multiple Choice Questions (Type - I) [पृष्ठ ८६]

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एनसीईआरटी एक्झांप्लर Chemistry [English] Class 12
पाठ 6 General Principle and Processes of Isolation of Elements
Multiple Choice Questions (Type - I) | Q 55.(e) | पृष्ठ ८६

संबंधित प्रश्‍न

Name the common elements present in the anode mud in electrolytic refining of copper. Why are they so present?


What is meant by the term “chromatography”?


Describe a method for refining nickel.


Out of PbS and PbCO3 (ores of lead), which one is concentrated by froth floatation process preferably?


Outline the principles behind the refining of metals by the following methods:

Chromatographic method


Write the principle behind the following methods of refining:

Vapour-phase refining


What happens when Silver is leached with NaCN in the presence of air? 


What happens when Copper matte is charged into silica lined converter and hot air blast is blown? 


Name the method of refining which is Used to obtain semiconductor of high purity. 


Zone refining is based on the principle that ______.


In the extraction of chlorine from brine:

(i) ∆GΘ for the overall reaction is negative.

(ii) ∆GΘ for the overall reaction is positive.

(iii) EΘ for overall reaction has negative value.

(iv) EΘ for overall reaction has positive value.


Write two basic requirements for refining of a metal by Mond process and by Van Arkel Method.


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: Zone refining method is very useful for producing semiconductors.

Reason: Semiconductors are of high purity.


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.


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