Which of the following processes is/are the examples of leaching :
(I) Mac Aurthur forest process (II) Hoop’s process
(III) Baeyer’s process (IV) Serpeck’s process
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Which of the following processes is/are the examples of leaching : (I) Mac Aurthur forest process (II) Hoop’s process (III) Baeyer’s process (IV) Serpeck’s process Choose the correct code:

TestHub · Accepted Answer

(C) (I) In Mac Arthur forest process, silver ore is leached out as $[Ag (CN)_{2}]^{-}$

$A g_{2} S + N a CN ⇌ air 2 [A g (CN)_{2}]^{-} + 2 N a^{+} + N a_{2} S$

(II) In Baeyer's process, alumina and $SiO_{2}$ is leached out as $[Al (OH)_{4}]^{-}$ and $Na_{2} SiO_{3}$ respectively. (III) Hoop's process is for purification of Aluminium.

(IV) In Serpeck's process bauxite is heated with coke in the presence of $N_{2}$ gas hence it is not an
example of leaching as it does not occur in aqueous medium.]

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