Question

An organic Compound having C, H and ‘S’ contains 4% of sulphur. The Minimum molecular mass of compound is-

• A. 200
• B. 400
• C. 600
• D. 800

Answer 1

Answer: (D)

800

Answer 2

The minimum mol mass must contain at least one 'S' atom –

\ S % = $\frac{massofone'S'atom}{{min.}molemass} \times 100$

4 = $\frac{32}{{min.}molemass} \times 100$

min. mol. mass = $\frac{32}{4} \times 100$

= 800