Q. An organic compound having carbon, hydrogen and sulphur contains 4% of sulphur. The minimum molecular weight of the compound is
A) 500
B) 800
C) 400
D) 100
Explanation
(b)
As the min mol wt. must have at least one S-atom so
$S\ \% = \frac{wt.of\ one\ S - atom}{min.mol.wt} \times 100$
$4 = \frac{32}{\min{mol.\ wt}} \times 100$
Min mol wt. $\frac{32 \times 100}{4} = 800$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.