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General Principles and processes of Isolation of Elements
easy
Which method is not correct given for refining of crude metals?
A
Distillation : zinc and mercury
B
Liquation : tin
C
van Arkel : Zirconium
D
Mond process : lead
Solution
Mond process is used for the refining of nickel.
Nickel is heated with $CO$ to form highly volatile nickel tetracarbonyl.
It is then decomposed to pure nickel at high temperature.
Standard 12
Chemistry
Similar Questions
Match List$-I$ with List $- II :$
|
List$-I$ (Name of ore/mineral) |
List$-II$ (Chemical formula) |
| $(a)$ Calamine | $(i)$ $\mathrm{Zns}$ |
| $(b)$ Malachite | $(ii)$ $\mathrm{FeCO}_{3}$ |
| $(c)$ Siderite | $(iii)$ $\mathrm{ZnCO}_{3}$ |
| $(d)$ Sphalerite | $(iv)$ $\mathrm{CuCO}_{3} \cdot \mathrm{Cu}(\mathrm{OH})_{2}$ |
Choose the most appropriate answer from the options given below :
