1.

The flux that can be used for the removal of hasic impurities like Cound Fe from anore is (are)

Answer»

`SiO_(2)`
`Na_(2)B_(4)O_(7)10H_(2)`
`MgCO_(3)`
`CaCO_(3)`

Solution :To remove BASIC impurities acidic compounds are used. `SiO_(2) Na_(2) B_(4)O_(7)10H_(2)O` also used as flux to dissolve many metal OXIDES (Basic) to form Borates of low Mpt


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