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Out of PbS and PbCO(3) (ores of lead), w...

Out of PbS and `PbCO_(3)` (ores of lead), which one is concentraed by froth floatation process preferably ?

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(a) Write the principle of method used for the refining of germanium (b) Out of PbS and PbCO_(3) (ores of lead), which one is concentrated by froth floatation process preferably ? (c) What is the significance of leaching in the extraction of aluminium ?

The ore that is concentrated by froth floatation process is

The ore that is concentrated by froth floatation process is

Sulphide ore of copper can be concentrated by froth floatation process.

Name two ores which are concentrated by froth floatation method.

CBSE COMPLEMENTARY MATERIAL-SOLVED SAMPLE PAPER (CBSE DELHI - 2017)-CBSE DELHI - 2017
  1. Following compounds are given to you : 2- Bromopentane ,2-Bromo-2 me...

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  2. Write the principle of method used for the refining of germanium.

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  3. Out of PbS and PbCO(3) (ores of lead), which one is concentraed by fro...

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  4. What is the significance of leaching in the extraction of aluminium?

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  5. Write structures of compounds A, B and C in each of the following reac...

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  6. Write structures of compounds A, B and C in each of the following reac...

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  7. Do the following conversions in not more than two steps Benzoic acid...

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  8. Do the following conversions in not more than two steps Ethyl benzen...

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  9. Do the following conversions in not more than two steps Prepanone to...

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  10. Write the structures of the monomers used for getting the following po...

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  11. Write the structures of the monomers used for getting the following po...

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  12. Write the structures of the monomers used for getting the following po...

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  13. Define the following : Anionic detergents

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  14. Define the following : Broad spectrum antibiotics

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  15. Define the following : Antiseptic

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  16. Give reasons : Thermal stability decreases from H(2)O " to " H(2) Te...

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  17. Give reasons : Fluoride ion has higher hydration enthalpy than chlor...

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  18. Give reasons : Nitrogen does not form pentahalide.

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  19. Give reasons : Acetylation of aniline reduces its activation effect.

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  20. Give reasons : CH(3)NH(2) is more basic than C(6)H(5)NH(2).

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