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Give an ore of Sn and Pb...

Give an ore of Sn and Pb

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The stability of ions of Ge Sn and Pb will be in the order .

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Knowledge Check

  • vii. The stability of dihalides of Si, Ge , Sn and Pb increases steadily in the sequence :

    A
    `PbX_(2) lt lt SnX_(2) lt lt GeX_(2) lt lt SiX_(2)`
    B
    `GeX_(2) lt lt SiX_(2) lt lt SnX_(2) lt lt PbX_(2)`
    C
    `SiX_(2) lt lt GeX_(2) lt lt PbX_(2) lt lt SnX_(2)`
    D
    `SiX_(2) lt lt GeX_(2) lt lt SnX_(2) lt lt PbX_(2)`

  • Sometimes, it is possible to separate two sulphide ores by adjusting proportion of oil to water or by using depressants. In case of an ore containing ZnS and PbS, the depresent used is

    A
    NaCN prevents PbS from coming to the froth but allows ZnS to come with froth .
    B
    NaCN prevents ZnS from coming to the froth but allows PbS to come with froth.
    C
    NaCN prevents frothing of both ZnS and PbS, hence no froth is formed.
    D
    NaCN does not act as depressant hence a mixture of PbS and ZnS is found in froth.

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