Which of the following statement(s) is/are in | vedclass

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Question

(D) Statement $A$ is correct: Liquation is used for metals with low melting points (e.g.,$Sn, Pb, Bi$) compared to impurities.Statement $B$ is correct

Vedclass · Accepted Answer

Amalgamation method of purification cannot be applied for $Au$ and $Ag$.

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(D) Statement $A$ is correct: Liquation is used for metals with low melting points (e.g.,$Sn, Pb, Bi$) compared to impurities.Statement $B$ is correct: $Fe_3C$ (cementite) formation increases the hardness of steel.Statement $C$ is correct: Metals like $Hg$ $(HgS + O_2 \rightarrow Hg + SO_2)$ and $Cu$ ($2Cu_2S + 3O_2 \rightarrow 2Cu_2O + 2SO_2$; $2Cu_2O + Cu_2S \rightarrow 6Cu + SO_2$) are extracted via auto-reduction.Statement $D$ is incorrect: The amalgamation process is specifically used for the extraction and purification of noble metals like $Au$ and $Ag$ because they form amalgams with mercury.

Which of the following statement$(s)$ is/are incorrect?

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