An aquesous solution of urea [6%w/v] is isotonic with NaCI solution then mass-volume percentage (%w/v) of NaCI solution then mass- volume precentage (%w/v) of NaCI solution will be :-

Options

A. `1.46%`
B. `5.85%`
C. `2.92%`
D. `11.7%`

Answer

C

Explanation

`pi_(1)=pi_(2)`
`:.i_(1)c_(1)=i_(2)c_(2)`
`1xx(6)/(60)xx10=2xx(w)/(58.5)xx10`
`:.W=(58.5)(20)=2.925g`