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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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Sometimes it is possible to separate two sulphide ores by adjusting the proportion of oil to water or by using depressant NaCN is added to an ore conaining ZnS and PbS, what is the correct observation?

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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

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.
    • AAKASH INSTITUTE ENGLISH-TEST 9-EXAMPLE
    1. Give an ore of Sn and Pb

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    2. Which of the following is a pair of peroxy compounds?

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    3. Phosphine can be prepared by the reaction of

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    4. Which of the following complexs is not correctly matched with hybridiz...

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    5. The weight of 1 atom of an element is 3.98 x 10^-23.what is its atom m...

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    6. Among the following,biogradable polymer is

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    7. The weight of 1 atom of an element is 2.98 x 10^-23.what is its atom m...

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    8. Benzamide on treatment with Br2 and alkali gives

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    9. Observe the following compounds (A) CH3CH2CHO (B) CH3COCH3 (C) Ph-C...

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    10. What is racemisation?

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    11. Which of the following reaction mixtures does not produce 1^circ alcoh...

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    12. Which of the following is an achiral compound?

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    13. Correct reactivity order of alkyl halides towards SN2 reaction is

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    14. pH of 0.2 M monobasic acid is 5. pKa value of monobasic acid is (log 5...

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    15. For a chemical reaction, observed thermodynamic parameters are given b...

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    16. 3 g of a gas (X) AT 77^circ C occupy the same volume as 0.1 g of Hydro...

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    17. Which one of the following statements is incorrect?

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    18. The rate of a first order reaction is 2.5 × 10^(-3 )mol L^(-1) min^(-...

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    19. What is Flux and its role in metallurgy?

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    20. 3F eletricity was passed through molten FeO. Weight of iron metal (Ato...

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