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प्रश्न
Assertion: Zirconium can be purificed by Van Arkel method.
Reason: ZrI4 is volatile and decomposes at 1800 K.
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 and reason is the correct explanation of assertion.
Explanation:
van Arkel method is very useful for removing all the oxygen and nitrogen present in the form of impurity in certain metals like Zr and Ti.The crude metal is heated in an evacuated vessel with iodine. The metal iodide being more covalent, volatilises and then decomposes at 1800 K to given pure Zr.
\[\ce{Zr + 2I2 -> ZrI4}\]
\[\ce{ZrI4 ->[1800K] Zr + 2I2}\]
APPEARS IN
संबंधित प्रश्न
Name the method used for the refining of zirconium.
Explain the principle of the method of electrolytic refining of metals. Give one example.
Outline the principles of refining of metals by the following method:
Vapour phase refining
Indicate the principle behind the method used for the refining of Nickel.
Write the principle behind the following methods of refining:
Vapour-phase refining
Write down the reaction taking place in blast furnace related to the metallurgy of iron in the temperature rnge 500 K – 800 K. What is the role of limestone in the metallurgy of iron?
Name the method of refining which is Used to obtain low boiling metal.
Electrolytic refining is used to purify which of the following metals?
Why is an external emf of more than 2.2 V required for the extraction of \[\ce{Cl2}\] from brine?
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 |
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?
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.
