Chemistry - Salt Analysis Question with Solution | TestHub
Column I | Column II |
|---|---|
(A) | (P) give fumes/gas with dil |
(B)
| (Q) give violet coloured ppt. with |
(C)
| (R) give white ppt with solution |
(D) | (S) identified by brown ring test |
| (T) identified by methylene blue dye test |
Options:
Answer:
Solution:
(A) S₂O₃²⁻ → P, Q, R: Evolves SO₂ gas with dilute H₂SO₄ (P), gives a violet precipitate with (Q), and forms white BaS₂O₃ precipitate with BaCl₂ (R).
(B) NO₃⁻ → S: Does not react with dilute H₂SO₄, but is uniquely confirmed by forming a brown complex in the brown ring test (S).
(C) NO₂⁻ → P, S: Evolves brown NO₂ gas fumes with dilute H₂SO₄ (P) and also gives a positive brown ring test (S).
(D) S²⁻ → P, T: Evolves H₂S gas with dilute H₂SO₄ (P) and reacts with p-aminodimethylaniline to form a characteristic methylene blue dye (T).
