Which of the following metals is extracted by the cyanide process (leaching)?

An ore of tin containing $FeCrO_4$ is concentrated by

Which of the following metals can be extracted through alkali leaching technique?

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

In the leaching of alumina from bauxite,the ore impurity expected to leach out in the process by reacting with $NaOH$ is:

During the extraction of sodium aluminate from bauxite,the compounds of ....... are insoluble and precipitate out.