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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.
Name the method of refining of metals such as Germanium.
Describe the roles of the following: NaCN in froth floatation process
Explain:
Zone refining
Out of PbS and PbCO3 (ores of lead), which one is concentrated by froth floatation process preferably?
Write the chemical equations involved in van Arkel method for refining zirconium metal.
What happens when NaCN is added in an ore containing PbS and ZnS during concentration by froth floatation method?
Zone refining is based on the principle that ______.
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: Nickel can be purified by Mond process.
Reason: \[\ce{Ni(CO)4}\] is a volatile compound which decomposes at 460 K to give pure Ni.
Purification of crude metals by removing metallic and non-metallic impurities is known as ______ of metals.
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.
