The role of depressants in the Froth Flotation method is to $.....$.

  • A
    selectively prevent one component of the ore from coming to the froth.
  • B
    reduce the consumption of oil for froth formation.
  • C
    stabilize the froth.
  • D
    enhance non-wettability of the mineral particles.

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The purification of alumina is called

The method of concentrating the ore which makes use of the difference in density between ore and impurities is called:

$4 Ag_{(s)} + 8 CN^{-}_{(aq)} + 2 H_2O_{(l)} + O_{2(g)} \longrightarrow 4 [Ag(CN)_2]^{-}_{(aq)} + 4 OH^{-}_{(aq)}$
The above reaction represents the process of concentration of ore in the extraction of silver. This process is:

Wolframite ore is separated from tinstone ore by the process of

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The concentration of chromite ore $(FeO \cdot Cr_2O_3)$ is done by which of the following methods?

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