A) \[4KCl{{O}_{3}}\xrightarrow[{}]{{}}3KCl{{O}_{4}}+KCl\]
B) \[2C{{u}^{+}}\xrightarrow[{}]{{}}C{{u}^{2+}}+Cu\]
C) \[5{{X}^{-}}+XO_{3}^{-}+6{{H}^{+}}\xrightarrow[{}]{{}}3{{X}_{2}}+3{{H}_{2}}O\]
D) \[4P+3NaOH+3{{H}_{2}}O\to \]\[P{{H}_{3}}+3Na{{H}_{2}}P{{O}_{2}}\]
Correct Answer: C
Solution :
| [c] The change in oxidation numbers are |
| [a] \[Cl:+\,5\to +7\] and - 1 |
| [b] \[Cu:+1\to +2\] and 0 |
| [c] \[X:-1\to 0\] |
| [d] \[P:0\to -3\] and + 1 |
| In [a], [b] and [d], a single oxidation number (of the reactant atom) undergoes a simultaneous increase and decrease, but in [c], two different oxidation numbers of an atom in the reactants are not involved. |
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