If a `6.84%`(wt,vol.)solutionof cane sugar(mol.Wt.=`342`)is isotonic with `1.52%(wt.//vol.)`solution of thiocarbamide ,then the molecular weight of thiocarbamide is

Options

A. 152
B. 76
C. 60
D. 180

Answer

B

Explanation

For isotonic solution `C_(1) =C_(2)`
`( g_(1))/( M_(1)V_(1))=( g_(2))/(M_(2)V_(2))`
`( 6.84 )/( 342 xx 0.1) = ( 1.52)/( M_(2) xx0.1)`
`M_(2) = ( 1.5 xx342 )/( 6.84 ) `