Analytical Chemistry Question 86

Question: In the group III radicals, in place of $ NH_4Cl $ which of the following can be used

[AIIMS 1980, 82; MP PMT 1985]

Options:

A) $ NH_4NO_3 $

B) $ {{(NH_4)}_2}SO_4 $

C) $ {{( NH_4 )}_2}CO_3 $

D) $ NaCl $

Show Answer

Answer:

Correct Answer: A

Solution:

$ NH_4^{+} $ ions are required to supress the ionization of NH4OH but sufficient to precipitate the III group radicals. (NH4)2SO4 can’t be used as $ SO_4^{2-} $ ions will precipitate Ba2+ as BaSO4