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Chemistry
Which of the following represent redox reactions?
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Q. Which of the following represent redox reactions?
General Principles and Processes of Isolation of Elements
A
$Cr _2 O _7^{2-}+2 OH ^{-} \rightarrow 2 CrO _4^{2-}+ H _2 O$
B
$2 CrO _4^{2-}+2 H ^{+} \rightarrow Cr _2 O _7^{2-}+ H _2 O$
C
$2 MnO _4^{-}+3 Mn ^{2+}+4 OH ^{-} \rightarrow 5 MnO _2+2 H _2 O$
D
$2 Cu ^{+} \rightarrow Cu + Cu ^{2+}$
Solution:
Correct answer is (c) $2 MnO _4^{-}+3 Mn ^{2+}+4 OH ^{-} \rightarrow 5 MnO _2+2 H _2 O$Correct answer is (d) $2 Cu ^{+} \rightarrow Cu + Cu ^{2+}$