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Relative lowering of vapour pressure of ...

Relative lowering of vapour pressure of al dilute solution of gluscose dissolved in 1kg of water is 0.002.The molality of the solution is

A

`0.004`

B

`0.222`

C

`0.111`

D

`0.021`

Text Solution

Verified by Experts

The correct Answer is:
C
(c) : Relative lowering of vapour pressure for dilute solution i.e., `(p^(@) -p_(s))/(p^(@)) ~~ (n_(2))/(n_(1))`
Given: `(p^(@)-p_(s))/(p^(@)) = 0.002, n_(1(H_(2)O)) = (1000)/(18)` moles For dilute solution, `n_(2)` is molality `= 0.002 xx = (1000)/(18)` m
= 0.111 m
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Knowledge Check

  • Relative lowering of vapour of a dilute solution of glucose dissolved in 1 kg of water is 0.002. The molality of the solution is

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