Which among the following elements is obtained in pure form by the liquation process of refining?

The solubilities of the impurities in the melt and solid states are not the same. This principle is applied during the extraction of boron. This method is known as:

Which method is used to obtain highly pure $Si$?

Explain the $Mond$ process for the refining of $Nickel$.

The formation of $Ni(CO)_4$ and its subsequent decomposition into $Ni$ and $CO$ forms the basis of the Mond process.
$Ni + 4CO$ $\xrightarrow{T_1} Ni(CO)_4$ $\xrightarrow{T_2} Ni + 4CO$
What are the values of $T_1$ and $T_2$?

Electrolytic refining is used to purify which of the following metals?