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On dissolving 2.34g of non-electrolyte s...

On dissolving 2.34g of non-electrolyte solute in 40g of benzene, the boiling point of solution was higher than benzene by 0.81K. Kb value for benzene is 2.53 K `kgmol^(-1)` .Calculate the molar mass of solute. [Molar mass of benzene is 78 `gmol^(-1)`]

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`DeltaT_(b)=(1000xx w_(2)xxk_(b))/(M_(2)xxw_(1))`
`M_(2)=(1000xxw_(2)xxk_(b))/(DeltaT_(b)xxw_(1))=(1000xx2.34xx2.53)/(0.81xx40)`
`M_(2)="182.72 gmol"^(-1)`
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SUNSTAR PUBLICATION-II PUC CHEMISTRY (ANNUAL EXAM QUESTION PAPER MARCH - 2014)-PART - D
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  2. What is Frenkel defect? Give an example.

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  3. On dissolving 2.34g of non-electrolyte solute in 40g of benzene, the b...

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  4. State Henry's law. Write its mathematical form.

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  5. Draw a neat labeled diagram of Standard Hydrogen Electrode (SHE). Writ...

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  6. b) Calculate Delta(r)G^(@) for the following reaction: Fe((aq))^(+2)...

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  7. a) The rate of a particular reaction doubles when the temperature chan...

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  8. b) Show that the half - life period of a first order reaction is indep...

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  9. Write any two differences between physisorption and chemisorption.

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  10. i) Mention the role of alum in the purification of drinking water. i...

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  11. a) i) write the equations for the steps in SN1 mechanism of the conver...

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  12. b) Complete the following equation: i) C(2)H(5)OH+SOCl(2)rarr ii)

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  13. i) Explain the preparation of phenol from cumene. ii) Complete the r...

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  14. Explain Williamson's ether synthesis.

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  15. i) How do you convert benzoic acid to benzamide? Write the reaction. ...

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  16. What happens when the carbonly compounds are treated with hydrazine? W...

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  17. i) Explain Hoffmann bromamide degradation for the preparation of anili...

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  18. b) What is Hinsberg's reagent? Between CH(3)NH(2) and C(6)H(5)NH(2) wh...

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  20. Write the structure of Maltose.

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