MCQ
A $400\, mg$ iron capsule contains $100\, mg$ of ferrous fumarate, ${(CHCOO)_2}Fe$. The percentage of iron pasent in it is approximately ........... $\%$
- A$33$
- B$25$
- C$14$
- ✓$8$
$Fe$ present in $100\,mg$ of ${(CHCOO)_2}Fe$
$ = \frac{{56}}{{170}} \times 100\,mg = 32.9\,mg$
This is present in $400\,mg$ of capsule
$\%$ of $Fe$ in capsule $ = \frac{{32.9}}{{400}} \times 100 = 8.2$.
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