Question

An organic compound contains C,H and S the minimum molecular weight of the compound containing 10% sulphur is : (atomic weight of S=32 amu)

• A. $400gmo{l}^{-1}$
• B. $320gmo{l}^{-1}$
• C. $520gmo{l}^{-1}$
• D. $600gmo{l}^{-1}$

Answer 1

The correct option is B $320gmo{l}^{-1}$

10g of Sulphur is present in 100 g of an organic compound.
For minimum molar mass 1 S atom should be present in 1 molecule.
So, 32 g of sulphur is present in (100/10)*32 = 320 g of an organic Compound.
So , Minimum Molecular weight of the compound is 320 g/mol.