Redox Reactions And Electrochemistry Ques 769

Question: Which of the following reaction involves neither oxidation nor reduction

Options:

A) $ CrO_4^{2-}\to Cr_2O_7^{2-} $

B) $ Cr\to CrCl_3 $

C) $ Na\to N{{a}^{+}} $

D) $ 2S_2O_3^{2-}\to S_4O_6^{2-} $

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Answer:

Correct Answer: A

Solution:

[a] $ CrO_4^{2-}\to Cr_2O_7^{2-} $ O.N of Cr does not change. It remains +6 on both sides. Hence there is no oxidation or reduction.



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