Question

When 10g of a non-volatile solute is dissolved in 100 g of benzene, it raises boiling point by `1^(@)C` then molecular mass of the solute is (`K_(b)` for benzene `= 2.53 k-m^(-1)`)
A. 223 g
B. 233 g
C. 243 g
D. 253 g

Answer 1

Correct Answer - D
`Delta T_(b)=(K_(b)xx w xx1000)/(m xx W)`
`m=(K_(b)xx wxx 1000)/(Delta T_(b)xx W)=(2.53xx10xx1000)/(1xx100)=253 g`