When a manganous salt is fused with a mixture of $KNO_3$ and solid $NaOH$, the oxidation number of $Mn$ changes from $+2$ to:
- A$+4$
- B$+3$
- C$+6$
- D$+7$
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Similar Questions
Match the reactions in Column $I$ with the nature of the reactions/type of the products in Column $II$.
Column $I$ Column $II$ $A$. $O_2^{-} \rightarrow O_2 + O_2^{2-}$ $p$. redox reaction $B$. $CrO_4^{2-} + H^{+} \rightarrow$ $q$. one of the products has trigonal planar structure $C$. $MnO_4^{-} + NO_2^{-} + H^{+} \rightarrow$ $r$. dimeric bridged tetrahedral metal ion $D$. $NO_3^{-} + H_2SO_4 + Fe^{2+} \rightarrow$ $s$. disproportionation
| Column $I$ | Column $II$ |
| $A$. $O_2^{-} \rightarrow O_2 + O_2^{2-}$ | $p$. redox reaction |
| $B$. $CrO_4^{2-} + H^{+} \rightarrow$ | $q$. one of the products has trigonal planar structure |
| $C$. $MnO_4^{-} + NO_2^{-} + H^{+} \rightarrow$ | $r$. dimeric bridged tetrahedral metal ion |
| $D$. $NO_3^{-} + H_2SO_4 + Fe^{2+} \rightarrow$ | $s$. disproportionation |
Which of the following combinations does not evolve $Cl_2$ gas?
Difficult
View Solution$10 \, \text{mole}$ of ferric oxalate is oxidised by $x \, \text{mole}$ of $MnO_4^-$ in acidic medium. The value of $x$ is
Easy
View SolutionWhich of the following combinations of reagents does not undergo a redox reaction in an aqueous medium?
Medium
View SolutionWhich of the following occurs with $KMnO_4$ in neutral or faintly alkaline medium?
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