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Impure Ni + 4CO overset(60-80^(@)C)to Ni...

Impure `Ni + 4CO overset(60-80^(@)C)to Ni(CO)_(4)overset(180^(@)C)to Ni+4CO`
The above process of purification of the metal is known as

A

Cupellation

B

Mond's process

C

Van Arkel method

D

Zone refining

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The correct Answer is:
B
Known as Mond's/Vapour phase refining.
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Formation of Ni(CO)_(4) and subsequent its decomposition into Ni and CO makes basis of Mond's process, Ni+4CO overset(T_(1))to Ni(CO)_(4) overset(T_(2))to Ni+4CO, T_(1) and T_(2) are :

Formation of volatile Ni(CO)_(4) and then its subsquent decomposition into Ni and CO makes basis of Mond's process: Ni+4CO overset(T_(1))to Ni(CO)_(4) overset(T_(2))to Ni 4CO_(3) T_(1) and T_(2) are:

In Mond's process following chemcial changes occurs: underset(("Impure"))(Ni)+CO overset(330-350K)(rarr)[P] [P] overset (450-470K)(rarr) underset(("Pure")) (Ni)+CO Coordination number of Ni in [P] is…...

The number of unpaired electrons in Ni (CO)_(4) is

The number of unpaired electrons in Ni (CO)_(4) is

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ALLEN-METALLURGY-EXERCISE-02
  1. Which are correctly is matched

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  2. Which of the following reactions is not involved in serpeck's process ...

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  3. Impure Ni + 4CO overset(60-80^(@)C)to Ni(CO)(4)overset(180^(@)C)to Ni+...

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  4. Neutral refractory material used in furnaces is :

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  5. Carbon cannot be used in the reduction of Al(2)O(3) because :

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  6. From the following flowsheet for the extraction of pure metal, answer ...

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  7. Of the following reduction processes, correct processes are :

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  8. Consider the following steps: Cu(2)S overset("roast in air")rarr A o...

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  9. Main source of lead is galena (PbS). It is converted to Pb by : S...

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  10. Ag(2)S + NaCN rarr (A),(A) + Zn rarr (B) (B) is a metal. Hence, (A) ...

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  11. The elemental phosphorus is made from rock phosphate, Ca(3)(PO(4))(2) ...

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  12. A: Bauxite is purified by leaching process R: Aluminium oxide reacts ...

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  13. The process which do use catalysts are

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  14. Metallury involves steps :

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  15. Which of the following metals is obtained by electrolytic reduction pr...

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  16. Which of the following ore is/are oxide ore (s) ?

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  17. Which of the following are correctly matched?

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  18. In which of the following pair(s) the minerals are converted in to m...

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  19. Tin stone (cassiterite) is purified by magnetic seperation method .Na...

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  20. The reaction (s) which does (do) not occur in the reduction zone in ...

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