Analytical Chemistry Question 48
Question: Conc. $ HNO_3 $ is added before proceeding to test for group III members. This is to
[NCERT 1974]
Options:
A) Oxidise any remaining $ H_2S $
B) Convert ferrous ion into ferric ion
C) Form nitrates which give granular ppts
D) Increase ionisation of ammonium hydroxide
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Answer:
Correct Answer: B
Solution:
HNO3 oxidises $ F{e^{2+}} $ to $ F{e^{3+}} $ otherwise $ F{e^{2+}} $ is not completely precipitated as hydroxide
BETA
