JEE Mains · Chemistry · STD 11 - 7. Redox reactions
How many electrons are involved in the following redox reaction? \(C{r_2}O_7^{2 - } + F{e^{2 + }} + {C_2}O_4^{2 - } \to C{r^{3 + }} + F{e^{3 + }} + C{O_2}\) (Unbalanced)
- A \(3\)
- B \(4\)
- C \(6\)
- D \(5\)
Answer & Solution
Correct Answer
(C) \(6\)
Step-by-step Solution
Detailed explanation
Oxidation state of Cr in \(C{r_2}O_7^{2-}\): \(+6\) Oxidation state of Cr in \(C{r^{3+}}\): \(+3\) Electrons gained by Cr per mole of \(C{r_2}O_7^{2-}\): \(2 \times (+6 - +3) = 6e^-\) Oxidation state of Fe in \(F{e^{2+}}\): \(+2\) Oxidation state of Fe in \(F{e^{3+}}\): \(+3\)…
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