(B) The Van-Arkel method is primarily used for the purification of metals like $Ti$,$Zr$,$Hf$,and $B$. It is not used for tungsten $(W)$. Therefore,th

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Van-Arkel method is used to purify tungsten.

(B) The Van-Arkel method is primarily used for the purification of metals like $Ti$,$Zr$,$Hf$,and $B$. It is not used for tungsten $(W)$. Therefore,the statement in option $B$ is incorrect.

Class 12 Chemistry General Principles and Processes of Isolation of Elements Refining of crude Metal

Medium

Which one of the following statements is incorrect?

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A
Boron and Indium can be purified by zone refining method.
B
Van-Arkel method is used to purify tungsten.
C
Cast iron is obtained by melting pig iron with scrap iron and coke using hot air blast.
D
The malleable iron is prepared from cast iron by oxidising impurities in a reverberatory furnace.

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Class 12

Chemistry Questions

Chapter

General Principles and Processes of Isolation of Elements

Subtopic

Refining of crude Metal

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Formation of $Ni(CO)_4$ and its subsequent decomposition into $Ni$ and $CO$ (recycled) forms the basis of the Mond process.
$Ni + 4CO$ $\xrightarrow{T_1} Ni(CO)_4$ $\xrightarrow{T_2} Ni + 4CO$
$T_1$ and $T_2$ are:

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The pair of metals refined by "vapour phase refining" is

EasyAP EAMCET 2019

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During the electrolytic refining of silver,the anode mud contains:

Medium

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Match the following List-$I$ (Method) with List-$II$ (Metal refined):
List-$I$ (Method) List-$II$ (Metal refined)
$(A)$ Zone refining $(I)$ $Sn$
$(B)$ Liquation $(II)$ $In$
$(C)$ Vapour phase refining $(III)$ $Zn$
$(D)$ Distillation $(IV)$ $Zr$
- $(V)$ $Al$

The correct answer is:

List-$I$ (Method)	List-$II$ (Metal refined)
$(A)$ Zone refining	$(I)$ $Sn$
$(B)$ Liquation	$(II)$ $In$
$(C)$ Vapour phase refining	$(III)$ $Zn$
$(D)$ Distillation	$(IV)$ $Zr$
-	$(V)$ $Al$

EasyAP EAMCET 2023

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Give two requirements for vapour phase refining.

Medium

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Which one of the following statements is incorrect?

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Formation of $Ni(CO)_4$ and its subsequent decomposition into $Ni$ and $CO$ (recycled) forms the basis of the Mond process.$Ni + 4CO$ $\xrightarrow{T_1} Ni(CO)_4$ $\xrightarrow{T_2} Ni + 4CO$$T_1$ and $T_2$ are:

The pair of metals refined by "vapour phase refining" is

During the electrolytic refining of silver,the anode mud contains:

Match the following List-$I$ (Method) with List-$II$ (Metal refined):List-$I$ (Method)List-$II$ (Metal refined)$(A)$ Zone refining$(I)$ $Sn$$(B)$ Liquation$(II)$ $In$$(C)$ Vapour phase refining$(III)$ $Zn$$(D)$ Distillation$(IV)$ $Zr$-$(V)$ $Al$The correct answer is:

Give two requirements for vapour phase refining.

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Formation of $Ni(CO)_4$ and its subsequent decomposition into $Ni$ and $CO$ (recycled) forms the basis of the Mond process.
$Ni + 4CO$ $\xrightarrow{T_1} Ni(CO)_4$ $\xrightarrow{T_2} Ni + 4CO$
$T_1$ and $T_2$ are:

Match the following List-$I$ (Method) with List-$II$ (Metal refined):
List-$I$ (Method) List-$II$ (Metal refined)
$(A)$ Zone refining $(I)$ $Sn$
$(B)$ Liquation $(II)$ $In$
$(C)$ Vapour phase refining $(III)$ $Zn$
$(D)$ Distillation $(IV)$ $Zr$
- $(V)$ $Al$

The correct answer is: