Qualitative Analysis - Result Question 11
####11. A metal nitrate reacts with $KI$ to give a black precipitate which on addition of excess of KI convert into orange colour solution. The cation of metal nitrate is
(a) $Hg^{2+}$
(b) $Bi^{3+}$
(c) $Sn^{2+}$
(d) $Pb^{2+}$
$(2005,1 M)$
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Answer:
Correct Answer: 11. (b)
Solution:
- $Bi^{3+}+3 I^{-} \longrightarrow \underset{\text { Black }}{BiI _3 \downarrow} \underset{\text { excess }}{I^{-}} \underset{\substack{\text { Orange } \\ \text { solution }}}{\left[BiI _4 \Gamma\right.}$
