P-Block Elements Ques 457
Question: When $ SO_2 $ is passed through acidified $ K_2Cr_2O_7 $ solution
[CPMT 1989, 94]
Options:
A) The solution turns blue
B) The solution is decolourised
C) $ SO_2 $ is reduced
D) Green $ Cr_2{{(SO_4)}_3} $ is formed
Show Answer
Answer:
Correct Answer: D
Solution:
$ K_2Cr_2O_7+H_2SO_4+3SO_2\to $ $ K_2SO_4+\underset{Green}{\mathop{Cr_2{{(SO_4)}_3}}}+3H_2O $
