Match the method of concentration of the ore in column I with the ore in column II and select the correct altemate.
`{:(,"Column "I,,"Column "II,),((a),"Leaching.",,(p)" Copper pyrite",),((b),"Calcination.",,(q)" Siderite.",),((b),"Froth floatation",,(r)" Bauxite.",),((d),"Magnetic separation.",,(s)" Chromite.",):}`

Options

A. `{:(,"(a)","(b)","(c)","(d)"),(,s,q,p,r):}`
B. `{:(,"(a)","(b)","(c)","(d)"),(,r,q,p,s):}`
C. `{:(,"(a)","(b)","(c)","(d)"),(,p,q,r,s):}`
D. `{:(,"(a)","(b)","(c)","(d)"),(,q,r,p,s):}`

Answer

2

Explanation

`(a)` Bauxite is leached with `NaOH[` concentration `)` to form soluble `Na[Al(OH)_(4)]` complex and insoluble impurities are fittered off.
`(b)` Carbonate and hydroxide ores are heated in absence of air below their metling point to convert in to their oxides in reverberatory furnace. This is called calcination . So siderite,`FeCO_(3)` is subjected to calcination.
`(c )` This method is commonly used for the concentration of the low grade sulphide ores like galena, `PbS (` ore of `Pb),` copper pyrites `CuFeS_(2)(` ore of copper ) `,` zinc blende, `ZnS(` ore of zinc `)` etc., and is based on the fact that gangue and ore particles have different degree of wettability with water and pine oil, the gangue particles are preferentially wetted by water while the ore particles are wetted by oil.
`(d)` Chromite or `(FeO.Cr_(2)O_(3))`having magnetic properties is separated from non`-`magnetic silicious impurities by magnetic separator.