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प्रश्न
Assertion: Zone refining method is very useful for producing semiconductors.
Reason: Semiconductors are of high purity.
पर्याय
Both assertion and reason are true and reason is the correct explanation of assertion.
Both assertion and reason are true but reason is not the correct explanation of assertion.
Assertion is true but reason is false.
Assertion is false but reason is true.
Assertion and reason both are wrong.
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उत्तर
Both assertion and reason are true but reason is not the correct explanation of assertion.
Explanation:
In zone refining method, the impurities of semiconductors are more soluble in molten zone and the ultrapure semiconductor crystallizes.
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संबंधित प्रश्न
What is the principle behind the zone refining of metals?
Explain the principle of the method of electrolytic refining of metals. Give one example.
Explain:
Zone refining
Describe a method for refining nickel.
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 low boiling metal.
Electrolytic refining is used to purify which of the following metals?
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.
Give two requirements for vapour phase refining.
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: Hydrometallurgy involves dissolving the ore in a suitable reagent followed by precipitation by a more electropositive metal.
Reason: Copper is extracted by hydrometallurgy.
Explain the following:
Vapour phase refining method is used for the purification of Ti.
Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature?
Electrolytic reduction method is used for the extraction of ______.
Describe a method for refining nickel.
Describe a method for refining nickel.
