Redox Reactions And Electrochemistry Ques 473
Question: The oxidation state of chromium in the final product formed by the reaction between KI and acidified potassium dichromate solution is [AIEEE 2005]
Options:
A) +4
B) +6
C) +2
D) +3
Show Answer
Answer:
Correct Answer: D
Solution:
$ K_2Cr_2O_7+6KI+7H_2SO_4\to 4K_2SO_4+Cr_2{{(SO_4)}_3} $ $ +7H_2O+3I_2 $ $ \overset{*}{\mathop{C}},r_2{{(SO_4)}_3}\to 2\overset{+3}{\mathop{Cr}},+3SO_4^{2-} $
