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A set of solution is prepared using 180...

A set of solution is prepared using 180 g of water as a solvent and 10 g of different non - volatile solutes A, B and C . The relative lonwering of vapour pressure in the presence of these solutes are in the order . [ Given , molar mass of `A = 100 g mol^(-1)` `B = 200 g mol^(-1) , C = 10 ,000 g mol^(-1)`]

A

`B gt CgtA `

B

`C gt BgtA `

C

`A gt B gtC `

D

`A gt C gtB `

Text Solution

Verified by Experts

The correct Answer is:
C
Relative lowering in vapour pressure (RLVP)
`(P-P_s)/P=n/(n+N)`
` n rarr` moles of solute
` N rarr` moles of solvent
`n_A=10/100 ,n_B=10/200 ,n_c=10/10000`
From the above relation,
RLVP(A) `gt` RLVP(B) `gt` RLVP(C)
`AgtBgtC.`
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