Redox Reactions Question 2
Question 2 - 2024 (01 Feb Shift 1)
Which of the following reactions are disproportionation reactions?
(A) $Cu^{+} \rightarrow Cu^{2+}+Cu$
(B) $3 MnO _4^{2-}+4 H^{+} \rightarrow 2 MnO _4^{-}+MnO _2+2 H _2 O$
(C) $2 KMnO _4 \rightarrow K _2 MnO _4+MnO _2+O _2$
(D) $2 MnO _4^{-}+3 Mn^{2+}+2 H _2 O \rightarrow 5 MnO _2+4 H^{+}$
Choose the correct answer from the options given below:
(1) $(A),(B)$
(2) (B), (C), (D)
(3) (A), (B), (C)
(4) (A), (D)
Show Answer
Answer (1)
Solution
When a particular oxidation state becomes less stable relative to other oxidation state, one lower, one higher, it is said to undergo disproportionation.
$Cu^{+} \rightarrow Cu^{2+}+Cu$
$3 MnO _4^{2-}+4 H^{+} \rightarrow 2 MnO _4^{-}+MnO _2+2 H _2 O$
