Which of the following reactions is suitable for concentrating ore by the leaching process?
- A$2Cu_2S + 3O_2 \rightarrow 2Cu_2O + 2SO_2$
- B$Fe_3O_4 + CO \rightarrow 3FeO + CO_2$
- C$Al_2O_3 + 2NaOH + 3H_2O \rightarrow 2Na[Al(OH)_4]$
- D$Al_2O_3 + 6Mg \rightarrow 6MgO + 4Al$
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Observe the following statements regarding the purification of bauxite and select the correct answer.
$I$ : During the Hall's process,silicon is removed in the form of vapor.
$II$ : Bauxite containing $Fe_2O_3$ impurities is purified by the Bayer's process.
$III$ : During the Serpek's process,$AlN$ is formed.
$I$ : During the Hall's process,silicon is removed in the form of vapor.
$II$ : Bauxite containing $Fe_2O_3$ impurities is purified by the Bayer's process.
$III$ : During the Serpek's process,$AlN$ is formed.
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View SolutionWhat is the significance of leaching in the extraction of aluminium?
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View SolutionWolframite ore is separated from tinstone $(SnO_2)$ by which of the following processes?
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View Solution$4 Ag_{(s)} + 8 CN^{-}_{(aq)} + 2 H_2O_{(l)} + O_{2(g)} \longrightarrow 4 [Ag(CN)_2]^{-}_{(aq)} + 4 OH^{-}_{(aq)}$
The above reaction represents the process of concentration of ore in the extraction of silver. This process is:
The above reaction represents the process of concentration of ore in the extraction of silver. This process is:
Iron ore is concentrated by
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