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12 g of a solid solute is dissolved in 9...

12 g of a solid solute is dissolved in 90 gm pure water. Vapour pressure of the resulting solution is 750 mm Hg at `100^@C` temperature. Calculate molecular mass of the solute [Solute does not undergo any dissocia-tion or association in its aqueous solution]

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UNITED BOOK HOUSE-HIGHER SECONDARY EXAMINATION 2019-EXERCISE
  1. Calculate packing fraction of face-centred cubic unit cell.

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  2. What is the vapour pressure of purewater at 100^@C temperature?

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  3. 12 g of a solid solute is dissolved in 90 gm pure water. Vapour pressu...

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  4. Write cell reaction and calculate electrical work obtained from the fo...

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  5. Write composition of copper matte.

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

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

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

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

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

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

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  13. Write R/S configuration of

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

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

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

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  18. Mention one use of Lucas reagent.

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  19. Convert aniline to fluorobenzene.

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

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