Analytical Chemistry Question 18
Question: A mixture when heated with conc. $ H_2SO_4 $ with $ MnO_2 $ brown fumes are formed due to
Options:
A) $ B{r^{-}} $
B) $ NO_3^{-} $
C) $ C{l^{-}} $
D) $ {I^{-}} $
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Answer:
Correct Answer: A
Solution:
It is a lab method for the preparation of $ Br_2 $ e.g. $ 2\ KBr\ +\ MnO_2\ +\ H_2SO_4\ \to $
$ \underset{Brown\ gas}{\mathop{Br_2}}\ +\ 2\ KHSO_4\ +\ MnSO_4 $
BETA
