Redox Reactions And Electrochemistry Ques 445

Question: The oxidation state of $ Cr $ in $ Cr_2O_7^{2-} $ is [BHU 2000; CPMT 2000]

Options:

A) 4

B) - 6

C) 6

D) - 2

Show Answer

Answer:

Correct Answer: C

Solution:

$ \overset{*,}{\mathop{Cr_2O_7^{2-}}}, $ $ 2x-2\times 7=-2 $ ; $ 2x=14-2=12 $ $ x=\frac{12}{2}=+6 $ .



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