Number of electrons gained or lost in a given conversion

1. A.
   $\text{MnO}_4^- \rightarrow \text{Mn}^{2+}$
2. B.
   $\text{CrO}_4^{2-} \rightarrow \text{Cr}^{3+}$
3. C.
   $\text{NO}_3^- \rightarrow \text{NH}_4^+$
4. D.
   $\text{Cr}_2\text{O}_7^{2-} \rightarrow 2\text{Cr}^{3+}$

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1. A.
   4
2. B.
   3
3. C.
   2
4. D.
   1

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1. A.
   1
2. B.
   3
3. C.
   4
4. D.
   5

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1. A.
   $3n$
2. B.
   $4n$
3. C.
   $n$
4. D.
   $2n$

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1. A.
   $6n$
2. B.
   $4n$
3. C.
   $3n$
4. D.
   $2n$

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