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Chemistry
Chemistry
Problem
0.31 g of an alloy of Fe + Cu was dissolved in excess dilute
H
2
SO
4
\text{H}_2\text{SO}_4
H
2
SO
4
and the solution was made upto
100
mL
100 \text{ mL}
100
mL
.
20
mL
20 \text{ mL}
20
mL
of this solution required
3
mL
3 \text{ mL}
3
mL
of
N
30
K
2
Cr
2
O
7
\frac{N}{30} \text{ K}_2\text{Cr}_2\text{O}_7
30
N
K
2
Cr
2
O
7
solution for exact oxidation. The % purity (in closest value) of Fe in wire is :
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