An aqueous solution containing 1g of urea boils at `100.25^(@)C`. The aqueous solution containing 3g of glucose in the same volume will boil be

Options

A. `100.75^(@)C`
B. `100.5^(@)C`
C. `100^(@)C`
D. `100.25^(@)C`

Answer

D

Explanation

`Delta T_(b) = (K_(b) xx 1000 xx w_(B))/(w_(A) xx M_(B))`
Since `k_(b)` and `w_(A)` are same for two solutions.
`(Delta T_(b))/(Delta T_(b)) = (w_(B) xx M_(B))/(W_(B) xx M_(B))`
`Delta T_(b)` (urea) `= 0.25^(@) , w_(B) = 1g, M_(B) = 60`
`Delta T_(b)` .(glucose ) = ? , `w_(B) = 3g, M_(B) = 180`
`therefore" " (0.25)/(Delta T_(b)) = (1 xx 180)/(3 xx 60) `
or `" " Delta T_(b) = 0.25^(@)`