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Correct Answer – B
`(P^(@)-P_(s))/(P_(s))=(w_(1)M_(2))/(w_(2)M_(1))`
To produce same lowering of vapour pressure `((P^(@)-P_(s))/(P_(s)))` term will be same for both the case (solvent is same)
`therefore (w_(g)xx18)/(50xx180)=(w_(u)xx18)/(50xx60)`
(`w_(g)` = weight of glucose, `w_(u)` = weight of urea)
or, `(w_(g)xx18)/(50xx180)=(1xx18)/(50xx60)` or, `w_(g)=3`.
Correct Answer – B
`(Deltap)_(“glucose”)=(Deltap)_(“urea”)`
`(x_(B))_(“glucose”)=(x_(B))_(“urea”)`
i.e., `((n_(B))/(n_(A)))_(“glucose”)=((n_(B))/(n_(A)))_(“urea”)`
`(w_(B))/(50)xx(18)/(180)=(1xx18)/(50xx60)`
`w_(B)=3g`]