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10g of an organic substance when dissolv...

10g of an organic substance when dissolved in two litres of water gave an osmotic pressure of 0.59 atm, at `7^(@)C`. Calculate the molecular weight of the substance.

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Verified by Experts

`pi=("Moles of solute")/("Litres of solution")xxRT`
`0.59=(10xx0.082xx280)/(Mxx2)`
`M=(10xx0.82xx280)/(2xx0.59)="194.6 g/mol"`
`"Molecular weight = 194.6 g/mole"`
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NCERT TAMIL-COLLIGATIVE PROPERTIES-QUESTION
  1. A solution containing 2.5 g of a non-volatile solute in 100 gm of benz...

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  2. 0.900g of a solute was dissolved in 100 ml of benzene at 25^(@)C when ...

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  3. 10g of an organic substance when dissolved in two litres of water gave...

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  4. A 0.5 percent aqueous solution of KCl was found to freeze at 272.76K. ...

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  5. The depression in the freezing point of a benzene solution containing ...

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  6. Properties which depend only on number of particles present in solutio...

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  7. Which solution would possess the lowest boiling point

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  8. In cold countries, ethylene glycol is added to water in the radiators ...

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  9. Which of the following 0.1M aqueous solutions will have the lowest fre...

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  10. The Van.t Hoff factor of 0.005M aqueous solution of KCl is 1.95. The d...

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  11. Relative lowering of vapour pressure is equal to in solution.

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  12. A liquid having high vapour pressure hasboiling point.

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  13. The least count of Beckmann.s thermometer is .

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  14. Molal elevation constant is a characteristic constant for a given .

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  15. Semipermeable membrane allows the passage of through it.

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  16. For a deliquescence to occur, the vapour pressure of water in the air ...

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  17. Depression in freezing point is pronounced if camphor is used as a sol...

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  18. Every solution behaves as ideal solution .

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  19. The osmotic pressures of 0.1M glucose and 0.1M NaCl solutions are .

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  20. Solutions that have same osmotic pressure are called solutions.

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