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. 342

Answer

B

Explanation

`M_(2) = (K_(b) xx W_(2))/(Delta T_(b) xx W_(1)) xx 1000 = (5.2 xx 6 xx 10 ^(-3))/(0.52 xx 100 xx 10^(-3))=60`