JEE Mains · Chemistry · STD 12 -1. Solution and colligative properties
Ferrous sulphate heptahydrate is used to fortify foods with iron. The amount (in \(grams\)) of the salt required to achieve \(10 \;ppm\) of iron in \(100 \;\mathrm{kg}\) of wheat is Atomic weight : \(Fe =55.85 ; \mathrm{S}=32.0\) \(\mathrm{O}=16.00\)
- A \(4.97\)
- B \(6.63\)
- C \(3.52\)
- D \(9.47\)
Answer & Solution
Correct Answer
(A) \(4.97\)
Step-by-step Solution
Detailed explanation
\(\mathrm{FeSO}_{4} \cdot 7 \mathrm{H}_{2} \mathrm{O}(\mathrm{M}=277.85)\) \(\mathrm{ppm}=\frac{\text { wt. of Fe }}{\text { wt. of wheat }} \times 10^{6}\) let the wt. of salt be \(=\mathrm{w} \mathrm{gm}\) moles \(=\frac{\mathrm{w}}{277.85}\) wt. of…
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