Analytical Chemistry Question 37
Question: $ Na_2CO_3 $ cannot be used to identify
[BVP 2004]
Options:
A) $ CO_3^{2-} $
B) $ SO_3^{2-} $
C) $ {S^{2-}} $
D) $ SO_4^{2-} $
Show Answer
Answer:
Correct Answer: A
Solution:
$ SO_3^{2-},{S^{2-}} $ and $ SO_4^{2-} $ salts from comparatively stronger acids (than $ H_2CO_3) $ in solution hence evolve $ CO_2 $ with $ Na_2CO_3 $ solution and give effervesence. While $ CO_3^{2-} $ does not react with $ Na_2CO_3 $ solution
BETA
