Elevation in boiling point was `0.52^(@)C` when 6 g of a compound X was dissolved in 100 g of water. Molecular weight of X is (`K_(b)` of water is `5.2^(@)C` per 100 g of water)

Options

A. 120
B. 60
C. 180
D. 600

Answer

B

Explanation

`M_(B) = (W_(B) xx K_(b) xx 1000)/( W_(A) xxDelta T_(b))`
`= ( 6 xx 0.52 xx 1000)/( 100 xx 0.52) = 60`