The Conjugate base of $[Fe(H_{2}O)_{6}]^{+3}$ is
$[Fe(H_{2}O)_{5}OH]^{+3}$
$[Fe(H_{2}O)_{5}OH]^{+2}$
$[Fe(H_{2}O)_{5}]^{+3}$
$H_{2}O$
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In the extraction of iron from its Haematite ore, the flux added and gangue formed respectively are