Which one of the following is true?

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(A) In the Bayer's process,$NaOH$ is used to leach bauxite ore $(Al_2O_3 \cdot 2H_2O)$ to separate it from impurities like $Fe_2O_3$ and $SiO_2$.$NaOH

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$NaOH$ is used in the concentration of bauxite ore

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(A) In the Bayer's process,$NaOH$ is used to leach bauxite ore $(Al_2O_3 \cdot 2H_2O)$ to separate it from impurities like $Fe_2O_3$ and $SiO_2$.$NaOH$ is not a primary standard because it is hygroscopic and absorbs $CO_2$ from the air.Manganous hydroxide,$Mn(OH)_2$,is insoluble in excess $NaOH$.$NaOH$ reacts with $Cl_2$ to form sodium chloride and sodium hypochlorite or chlorate depending on the temperature.

Similar Questions

Observe the following statements regarding the purification of bauxite:
$I$. During Hall's process,silica is removed as $Si$ (vapour).
$II$. Bauxite ore contaminated with $Fe_2O_3$ is purified in Baeyer's process.
$III$. During Serpeck's process,$AlN$ is formed.
The correct answer is:

Explain the concentration of ore by Magnetic Separation.

Which of the following ores is best concentrated by the froth-flotation method?

Bauxite ore is concentrated by

Which ore is concentrated by the froth flotation process?

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