Analytical Chemistry Question 126
Question: 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 the metal nitrate is
[IIT 2005]
Options:
A) $ H{g^{2+}} $
B) $ B{i^{3+}} $
C) $ P{b^{2+}} $
D) $ C{u^{+}} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ Bi{{( NO_3 )}_3}( aq )+3KI( aq )~\xrightarrow[{}]{{}}BiI_3( s )+\underset{(Black)}{\mathop{3KNO_3( aq )}} $
$ BiI_3( s )+KI( aq )~K\xrightarrow[{}]{{}}\underset{OrangeColour}{\mathop{[ BiI_4 ]}} $
BETA
