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Kb for diethylether is 2.16 K kg "mol"^(...

`K_b` for diethylether is 2.16 K kg `"mol"^(-1)`. Calculate the molar mass of solute when 0.4g of solute present in 40 g of ether, increased the boiling point of ether by 0.17 K.

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Weight of solute =w=0.4 g,
Weight of solvent = W=40 g
`K_b=2.16 "K kg mol"^(-1) , DeltaT_b`=0.17 K
Molar mass of solute
`=(wxxK_bxx1000)/(WDeltaT_b)=(0.4xx2.16xx1000)/(0.17xx40)=127 "g mol"^(-1)`
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AAKASH SERIES-SOLUTIONS -Objective Exercise -4
  1. Kb for diethylether is 2.16 K kg "mol"^(-1). Calculate the molar mass ...

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  2. Assertion : Molarity of a solution decreases with an increase of tempe...

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  3. Assertion : Molality is independent of temperature Reason : There is...

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  4. Assertion : Mole fraction has no units Reason: Mole fraction is a r...

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  5. Assertion: Pressure does not have significant effect on solubility of ...

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  6. Assertion: Increase in temperature increases vapour pressure of a liq...

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  7. Assertion :Rate of evaporation increases with an increase in the surfa...

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  8. Assertion : Sea water boils at higher temperature than distilled water...

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  9. Assertion: A pressure cooker reduces cooking time Reason: The boili...

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  10. Assertion : Vapour pressure of 0.5M sugar solution is more than 0.5M K...

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  11. Assertion : For two solutions, 0.1m aqueous solution of glucose and 0....

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  12. Assertion: If one component obeys Raoult's law over a certain range of...

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  13. Assertion: A solution is a homogeneous mixture of two or more chemical...

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  14. Assertion: The solubility of the gas in a liquid increa ses with incr...

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  15. Assertion: One molal aqueous solution of urea con tains 60g of urea in...

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  16. Assertion: One molar aqueous solution (d=1gm/cc) has always higher con...

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  17. Assertion: The pressure exerted by the vapour of a liquid at equilibri...

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  18. Assertion: At the same temperature water has higher vapour pressure th...

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  19. Assertion: Osmotic pressure is a colligative property. Reason: Osmo...

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  20. Assertion:Vapour pressure of water is less than 373K at 1.013 bar. R...

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  21. Assertion: Azeotropic mixtures are formed only by non-ideal solutions...

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