Analytical Chemistry Question 14
Question: Aqueous solution of a salt when treated with $ AgNO_3 $ solution gives a white precipitate, which dissolves in $ NH_4OH $ . Radical present in the salt is
Options:
A) $ C{l^{-}} $
B) $ B{r^{-}} $
C) $ {I^{-}} $
D) $ NO_3^{-} $
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Answer:
Correct Answer: A
Solution:
When $ C{l^{-}} $ , $ B{r^{-}} $ and $ {F^{-}} $ are treated with $ AgNO_3 $ solution in presence of dilute $ HNO_3 $ , corresponding silver halide is obtained which is soluble in $ NH_4OH, $ NaCN, and $ Na_2S_2O_3 $ . $ AgNO_3\ +\ NaCl\ \xrightarrow{{}}\ \underset{white}{\mathop{AgCl}}\downarrow \ +\ NaNO_3 $
$ AgCl\ +\ dil.2NH_4OH\ \xrightarrow{{}}\underset{complex}{\mathop{\ [ Ag{{(NH_3)}_2} ]Cl}}+2H_2O $
BETA
