A) \[Mn{{O}_{2}},\]\[MnO{}_{4}^{2-},\]\[M{{n}^{2+}}\]
B) \[Mn{{O}_{2}},\]\[M{{n}^{2+}},\]\[MnO{}_{4}^{2-}\]
C) \[M{{n}^{2+}},\]\[MnO{}_{4}^{2-},\]\[Mn{{O}_{2}}\]
D) \[M{{n}^{2+}},\]\[Mn{{O}_{2}},\]\[MnO{}_{4}^{2-}\]
Correct Answer: C
Solution :
[c]Change | Equiv. mass | |
\[\underset{+7}{\mathop{MnO_{4}^{-}}}\,\xrightarrow{{{H}^{+}}}\underset{+2}{\mathop{M{{n}^{2+}}}}\,\] | 5 | \[\frac{M}{5}\] |
\[\underset{+7}{\mathop{MnO_{4}^{-}}}\,\xrightarrow{{{H}_{2}}O}\underset{+6}{\mathop{MnO_{4}^{2-}}}\,\] | 1 | \[M\] |
\[\underset{+7}{\mathop{MnO_{4}^{-}}}\,\xrightarrow{O{{H}^{-}}}\underset{+4}{\mathop{Mn{{O}_{2}}}}\,\] | 3 | \[\frac{M}{3}\] |
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