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 $ .