Medium
Explain the purification of metals in the vapour phase with an example.
(N/A) Principle: In this method,the metal is converted into its volatile compound and collected,which is then decomposed to give the pure metal. The two requirements for this method are:
$(i)$ The metal should form a volatile compound with an available reagent.
$(ii)$ The volatile compound should be easily decomposable to recover the metal.
Example: Mond process for refining Nickel.
$Ni + 4CO \xrightarrow{330-350 \ K} Ni(CO)_4$
$Ni(CO)_4 \xrightarrow{450-470 \ K} Ni + 4CO$
$(i)$ The metal should form a volatile compound with an available reagent.
$(ii)$ The volatile compound should be easily decomposable to recover the metal.
Example: Mond process for refining Nickel.
$Ni + 4CO \xrightarrow{330-350 \ K} Ni(CO)_4$
$Ni(CO)_4 \xrightarrow{450-470 \ K} Ni + 4CO$
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Similar Questions
Given below are two statements.
Statement $I:$ During electrolytic refining,blister copper deposits precious metals.
Statement $II:$ In the process of obtaining pure copper by electrolysis method,blister copper is used to make the anode.
In the light of the above statements,choose the most appropriate answer from the options given below.
Statement $I:$ During electrolytic refining,blister copper deposits precious metals.
Statement $II:$ In the process of obtaining pure copper by electrolysis method,blister copper is used to make the anode.
In the light of the above statements,choose the most appropriate answer from the options given below.
One of the following metals forms a volatile compound and this property is taken advantage of for its extraction. This metal is
Difficult
View SolutionMatch the following:
| List-$I$ (Refining Methods) | List-$II$ (Metal to be refined) |
| :--- | :--- |
| $(A)$ Zone refining | $(I)$ Titanium |
| $(B)$ Poling | $(II)$ Tin |
| $(C)$ Liquation | $(III)$ Gallium |
| $(D)$ Vapour phase refining | $(IV)$ Copper |
| List-$I$ (Refining Methods) | List-$II$ (Metal to be refined) |
| :--- | :--- |
| $(A)$ Zone refining | $(I)$ Titanium |
| $(B)$ Poling | $(II)$ Tin |
| $(C)$ Liquation | $(III)$ Gallium |
| $(D)$ Vapour phase refining | $(IV)$ Copper |
Which of the following processes for refining of metals involves a principle of selective adsorption of the components from a mixture?
Match List-$I$ with List-$II$:
List-$I$ List-$II$ $a$. Mercury $i$. Vapour phase refining $b$. Copper $ii$. Distillation refining $c$. Silicon $iii$. Electrolytic refining $d$. Nickel $iv$. Zone refining
Choose the most appropriate answer from the options given below:
| List-$I$ | List-$II$ |
| $a$. Mercury | $i$. Vapour phase refining |
| $b$. Copper | $ii$. Distillation refining |
| $c$. Silicon | $iii$. Electrolytic refining |
| $d$. Nickel | $iv$. Zone refining |
Choose the most appropriate answer from the options given below:
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