A) Cuprous oxide reacts with alkaline \[KMn{{O}_{4}}\]solution.
B) Manganese dioxide is fused with \[{{K}_{2}}C{{O}_{2}}\] in presence of \[KN{{O}_{3}}.\]
C) Formaldehyde reacts with potassium permanganate in presence of concentrated potassium hydroxide solution.
D) In all of the above.
Correct Answer: D
Solution :
| [a] \[KMn{{O}_{4}}+C{{u}_{2}}O+KOH\]\[\xrightarrow{{}}2Cu\,\,{{(OH)}_{2}}+{{K}_{2}}\,Mn{{O}_{4}}.\] |
| [b] \[2KMn{{O}_{4}}+2{{K}_{2}}C{{O}_{3}}+{{O}_{2}}(from\,\,KN{{O}_{3}})\] \[\xrightarrow{{}}2{{K}_{2}}Mn{{O}_{2}}+2C{{O}_{2}}.\] |
| [c] \[HCHO+2KMn{{O}_{4}}+2KOH\]\[\xrightarrow{{}}2{{K}_{2}}Mn{{O}_{4}}+{{H}_{2}}O+HCOOH\] |
| [d] In all of the above |
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