JEE Mains · Chemistry · STD 11 -p-Block elements - I
During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in \(NH _4 OH\) solution when sodium carbonate extract was first acidified with dil. \(HNO _3\) and then \(AgNO _3\) solution was added. This indicates presence of _______.
- A \(Br ^{-}\)
- B \(I ^{-}\)
- C \(Cl ^{-}\)
- D \(CO _3{ }^{2-}\)
Answer & Solution
Correct Answer
(A) \(Br ^{-}\)
Step-by-step Solution
Detailed explanation
\(Ag ^{+}+ I ^{-}\rightarrow AgI\) - Yellow ppt \(Ag ^{+} Cl ^{-}\rightarrow AgCl\) - White ppt \(Ag ^{+} Br ^{-}\rightarrow AgBr\) - Pale yellow ppt
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