Analytical Chemistry Question 19
Question: A substance on treatment with dil $ H_2SO_4 $ liberates a colourless gas which produces (i) turbidity with baryta water and (ii) turns acidified dichromate solution green. The reaction indicates the presence of
[IIT 1992]
Options:
A) $ CO_3^{2-} $
B) $ {S^{2-}} $
C) $ SO_3^{2-} $
D) $ NO_2^{-} $
Show Answer
Answer:
Correct Answer: C
Solution:
$ Na_2SO_3+2HCl(dil\text{.})\to 2NaCl+H_2O+SO_2 $ , $ K_2Cr_2O_2+H_2SO_4+3SO_4\to K_2SO_4+\underset{\text{(Green)}}{\mathop{Cr_2{{(SO_4)}_3}}}+H_2O $
BETA
