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How many grams of sucrose (molecular wei...

How many grams of sucrose (molecular weight 342) should be dissolved in `100 g` water in order to produce a solution with `105^(@)C` difference between the freezing point and the boiling point ? `(K_(b) =0.51^(@)C m^(-1) , (K_(f) =1.86^(@)C m^(-1))`

A

`34.2g `

B

72 g

C

342 g

D

460 g

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The correct Answer is:
B
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The amount (in grams) of sucrose (mol.wt. = 342g) that should be dissolved in 100 g water in order to produce a solution with a 105.0^@C difference between the boiling point and freezing point is (Given that k_f=1.86Kkgmol^(-1) and k_b=0.52Kkgmol^(-1)" for water") Report your answer by rounding it up to to the nearest whole number.

How many moles of sucrose should be dissolved in 500 g of water so as to get a solution which has a difference of 104^(@)C between boiling point and freezing point ? ( K_(f) = 1.86 K kg mol^(-1) , K_(b) = 0.52 K kg mol^(-1) )

How many moles of sucrose should be dissolved in 500 g of water so as to get a solution which has a difference of 103.57^(@)C between boiling point and freezing point :- (K_(f)=1.86" K kg mol"^(-1), K_(b)="0.52 K kg mol"^(-1))

The boiling point of an aqueous solution is 100.18 .^(@)C . Find the freezing point of the solution . (Given : K_(b) = 0.52 K kg mol^(-1) ,K_(f) = 1.86 K kg mol^(-1))

The amount of urea to be dissolved in 500 cc of water (K_(f)=1.86) to produce a depresssion of 0.186^(@)C in the freezing point is :

An aqueous solution boils at 101^(@)C . What is the freezing point of the same solution? (Gives : K_(f) = 1.86^(@)C// m "and" K_(b) = 0.51^(@)C//m )

FIITJEE-LIQUID SOLUTION -ASSIGNMENT PROBLEMS (OBJECTIVE) level-I
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  2. The relationship between osmotic pressure at 273 K when 10 g glucose (...

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  3. How many grams of sucrose (molecular weight 342) should be dissolved i...

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  4. The freezing point of 0.1 M solution of glucose is -1.86^(@)C. If an e...

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  5. In certain solvent, phenol dimerizes to the extent of 60%. Its observe...

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  7. The vapoure pressure of an aqueous solution of glucose is 750 mm of Hg...

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  8. Normal boiling point of water is 373 K. Vapour pressure of water at 29...

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  9. The molal freezing point constant for water is 1.86^(@)C//m. Therefore...

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  10. At 40^(@)C, the vapour pressures in torr, of methyl alcohol and ethyl ...

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  11. A solution containing 8.6g urea in one litre was found be isotonic wit...

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  12. The use of common salts, e.g., NaCl or CaCl(2) anhydrous, is made to c...

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  13. Two solutions of KNO(3) and CH(3)COOH are prepared separately. The mol...

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  14. A solution of 1.25g of a certain non-volatile substance in 20g of wate...

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  15. At 88^(@)C benzene has a vapour pressure of 900 torr and toluene has a...

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  16. The freezing point of aqueous solution that contains 5% by mass urea, ...

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  17. Out of the following, which reaction gives rise to a colloidal sol:

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  18. The effect of presure on adsorption is high if

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  19. Which of the following is not the property of hydrophilic solutions ?

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  20. Lyophilic sols are more stable than lyophobic sols because :

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