An organic compound contains C, H and S. The minimum molecular weight of the compound containing 8% sulphur is: (atomic weight of S = 32 amu)

Options

A. `600 "g mol"^(-1)`
B. `200 "g mol"^(-1)`
C. `400 "g mol"^(-1)`
D. `300 "g mol"^(-1)`

Answer

C

Explanation

8% of sulphur means 8 g of sulphur present in 100 g of an organic compound.
Thus, 32 g of sulphur present in `(100)/8xx32g =400g` of organic compound.
Therefore, minimum molecular weight of the compound is 400 g `"mol"^(-1)` .