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Hydroboration Oxidation

Solution A an...

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Solution A and B are formed by dissolving certain amount of glucose and sucrose in water. Vapour pressure of these solutions are 660 and 560 mm Hg respectively at 100 degree celsius. Ratio of molality of solutions A and B will be - (1) 14/13 (2) 33/14 (3) 15/35 (4) 35/15

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Q. 10 g glucose (molar mass 180) and 20 g of sucrose (molar mass 342) are dissolved in 100 g of water. What will be the vapour pressure of the resultant solution if the vapour pressure of water is 35 mm Hg?

Q. The relationship between osmotic pressure at 273 K when 10 g glucose, 10 g urea and 10 g sucrose are dissolved in 250 mL of water to form separate solutions is:

_{1}

_{2}

_{3}

are osmotic pressure of glucose, urea and sucrose solution respectively]

Q. 1 g mixture of glucose and urea present in 250 mL aqueous solution shows the osmotic pressure of 0.74 atm at

27^{o} C

. Assuming solution to be diluted, which are correct?

1. Percentage of urea in the mixture is 17.6.
2. Relative lowering of the vapour pressure of this solution is

5.41 \times 10^{- 4}

.
3. The solution will boil at

{100.015}^{o} C

K_{b}

of water is 0.5 K molality

^{- 1}

.
4. If glucose is replaced by the same amount of sucrose, the solution will show higher osmotic pressure at

27^{o} C

.
5. If glucose is replaced by the same amount of

N a C l

, the solution will show lower osmotic pressure at

27^{o} C

.

Q. If vapour pressure of pure liquid

A

100 mm Hg

and Vapour pressure of pure liquid

B

150 mm Hg

2

A

3

B

are mixed to form an ideal solution. The vapour pressure of solution will be:

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Hydroboration Oxidation

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