A definite mass of H 2 O 2 is oxidized by excess of acidified KMnO 4 and acidified K 2 Cr 2 O 7 in separate experiment. Which of the following is/are correct statement? [K = 39, Cr = 52, M

Question

A definite mass of H 2 ​ O 2 ​ is oxidized by excess of acidified KMnO 4 ​ and acidified K 2 ​ Cr 2 ​ O 7 ​ in separate experiment. Which of the following is/are correct statement? [K = 39, Cr = 52, Mn = 55]

TestHub · Accepted Answer

E of H₂O₂ = E of KMnO₄ = E of K₂Cr₂O₇ = E of O₂

$n_{K M n O_{4}} \times 5 = n_{K_{2} C r_{2} O_{7}} \times 6$

$\Rightarrow n_{K M n O_{4}} > n_{K_{2} C r_{2} O_{7}}$

or

$\frac{W _{K M n O_{4}}}{158} \times 5 = \frac{W _{K_{2} C r_{2} O_{7}}}{294} \times 6$

$\Rightarrow W_{K M n O_{4}} < W_{K_{2} C r_{2} O_{7}}$

or

$\frac{V \times M _{K M n O_{4}}}{1000} \times 5 = \frac{V \times M _{K_{2} C r_{2} O_{7}}}{1000} \times 6$

$\frac{M _{K M n O_{4}}}{M _{K_{2} C r_{2} O_{7}}} = \frac{6}{5}$

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