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Which type of ores is concentrated by fr...

Which type of ores is concentrated by froth floatation process?

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Ores concentrated by froth-floatation are -

Why are sulphide ores concentrated by froth floatation process?

Name the ores which are concentrated by froth floatation process.

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

Which one of the following ores is best concentrated by froth-floatation method -

Which type of ores can be concentrated by magnetic separation method?

Assertion (A) : Sulphide ores are concentrated by froth-floatation. Reason (R) : In froth-floatation, cresol stabilises the froth formed.

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UNITED BOOK HOUSE-HIGHER SECONDARY EXAMINATION 2019-EXERCISE
  1. Write composition of copper matte.

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  2. Write balanced equations for the reactions involved in the extraction ...

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  3. Which type of ores is concentrated by froth floatation process?

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  4. What is thermit mixture? Mentain one use of it.

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  5. Which of the following are coloured in aqueous solution? Give rea-sons...

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  6. Which of the following oxides are amphoteric? Mn2O7,CrO3,CrO3,V2O5

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  7. Explain why most of the Cu (1) compounds are unstable in aqueous solut...

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  8. What happens when MnO(4)^(2-) ion is kept in acid medium? Write bal-an...

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  9. Write R/S configuration of

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  10. Write structural formula of A for the following reaction:

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  11. Distinguish between propanone and pentan-3-one by a suitable chemi-cal...

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  12. Write the structural formula of A, B, C, D in the following reactions:

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  13. Write equation of the following conversion . Salicylic and aspirin.

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  14. Mention one use of Lucas reagent.

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  15. Convert aniline to fluorobenzene.

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  16. Write structural formula of the compounds A to D.

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  17. An organic compound A (C3H8O) on treatment with Cu dust at 573 K gives...

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  18. The followign compound is an example of peptide Write. Zwitterion s...

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  19. Write equation for the reaction of glucose with periodic acid.

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  20. Draw the graph of half-life period (t(1/2) versus initial concentratio...

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