Analytical Chemistry Question 65
Question: Which one of the following metal salts produces a blue coloured bead in cobalt nitrate charcoal cavity test-
Options:
A) $ Z{n^{2+}} $
B) $ M{g^{2+}} $
C) $ S{n^{2+}} $
D) $ A{l^{3+}} $
Show Answer
Answer:
Correct Answer: D
Solution:
[d] $ 2Co{{(NO_3)}_2}\xrightarrow{\Delta }2CoO+4NO_2+O_2 $
$ Al_2O_3+CoO\to \underset{(Bluecoloredbead)}{\mathop{Al_2O_3.CoO}} $
BETA
