Analytical Chemistry Question 207
Question: The salt used for performing ‘bead’ test in qualitative inorganic analysis is
Options:
A) $ K_2SO_4.Al_2{{( SO_4 )}_3}.24H_2O $
B) $ FeSO_4.{{( NH_4 )}_2}SO_44H_2O $
C) $ Na( NH_4 )HPO_4.4H_2O $
D) $ CaSO_4.2H_2O $
Show Answer
Answer:
Correct Answer: C
Solution:
[c] Microcosmic salt. $ Na( NH_4 )HPO_4.4H_2O $ is used for bead test $ Na.( NH_4 )HPO_4\to NaPO_3+NH_3+H_2O $
$ NaPO_3+CoO\to NaCo.PO_4( blue ) $
BETA
