When an impurity in a metal has greater affinity for oxygen and is more easily oxidises than metal i

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General Principles and processes of Isolation of Elements

easy

When an impurity in a metal has greater affinity for oxygen and is more easily oxidises than the metal itself. Then, the metal is refined by

cupellation

zone-refining

distillation

electrolytic process

Solution

Cupellation is used to separate noble metals like gold and silver. This process is carried out at a high temperature, so the impurities form oxides and slag. Since noble metals are inert, they do not get oxidised as easily as the impurities.

Standard 12

Chemistry

Chemical leaching is useful in the concentration of

easy

Mark the wrong statement

easy

Blister copper is refined by stirring molten impure metal with green logs of wood because such a wood liberates hydrocarbon gases (like $CH_4$). This process $X$ is called _ and the metal contains impurities of $Y$ is _.

hard

Aluminium is extracted from alumina $(Al_2O_3)$ by electrolysis of a molten mixture of

medium

Which of the following is correctly matched

easy

When an impurity in a metal has greater affinity for oxygen and is more easily oxidises than the metal itself. Then, the metal is refined by

Solution

Similar Questions

Chemical leaching is useful in the concentration of

Mark the wrong statement

Blister copper is refined by stirring molten impure metal with green logs of wood because such a wood liberates hydrocarbon gases (like $CH_4$). This process $X$ is called _________ and the metal contains impurities of $Y$ is _________.

Aluminium is extracted from alumina $(Al_2O_3)$ by electrolysis of a molten mixture of

Which of the following is correctly matched

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Blister copper is refined by stirring molten impure metal with green logs of wood because such a wood liberates hydrocarbon gases (like $CH_4$). This process $X$ is called _ and the metal contains impurities of $Y$ is _.