Redox Reactions And Electrochemistry Ques 672
Question: When $ SO_2 $ is passed through acidified solution of potassium dichromate, then chromium sulphate is formed. The change in valency of chromium is
Options:
A) + 4 to + 2
B) + 5 to + 3
C) + 6 to + 3
D) + 7 to + 2
Show Answer
Answer:
Correct Answer: C
Solution:
[c] $ K_2Cr_2O_7+3SO_2+4H_2SO_4\to $ $ K_2SO_4+Cr_2{{( SO_4 )}_3}+3SO_3+4H_2O $ O.N. of chrominum changes from +6 to +3
