In the froth-floatation process,palm oil functions as:

In the leaching method,bauxite ore is digested with a concentrated solution of $NaOH$ that produces $X$. When $CO_2$ gas is passed through the aqueous solution of $X$,a hydrated compound $Y$ is precipitated. $X$ and $Y$ respectively are

How can you separate alumina from silica in bauxite ore associated with silica? Give equations,if any.

Explain the leaching of:
$(i)$ Alumina from Bauxite (Bayer's Process)
$(ii)$ Gold and Silver (Cyanide Process)

Froth flotation method is used for the concentration of which type of ores?

Which step is involved in the extraction of $Pb$ from galena $(PbS)$?