Question

Insulin contains $3.4$% sulphur. The minimum molecular mass of insulin is :

• A. $940$
• B. $350$
• C. $470$
• D. $560$

Answer 1

The correct option is A $940$

According to given data,
$3.4$ g of $S$ is present in $100$ g of compound.
So, $1$ mol of $S$ or $32$ g $S$ is in $\frac{100\times 32}{3.4}=941.7\approx 940$ g.
So, minimum molecular mass of insulin is $940$ g.