1.

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

Answer»

`0.004`
`0.222`
`0.111`
`0.021`

Solution :(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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