Match Column I (anion) with Column II (observation with the stated reagent). Column I: P. S^2- with sodium nitroprusside; Q. NO2^- with FeSO4 and dilute acetic acid; R. I- with Pb(NO3)2; S. CH3COO^- with neutral FeCl3. Column II: 1. violet colour; 2. brown colour; 3. yellow precipitate; 4. deep red colour.

JEE Main levelSingle correct optionDifficulty 2 of 3qa099

Match Column I (anion) with Column II (observation with the stated reagent). Column I: P. $S X^{2 -}$ with sodium nitroprusside; Q. $NO X_{2} X^{-}$ with $FeSO X_{4}$ and dilute acetic acid; R. $I X^{-}$ with $Pb (NO X_{3}) X_{2}$ ; S. $CH X_{3} COO X^{-}$ with neutral $FeCl X_{3}$ . Column II: 1. violet colour; 2. brown colour; 3. yellow precipitate; 4. deep red colour.

Sulphide with nitroprusside gives violet

[Fe (CN) X_{5} NOS] X^{4 -}

, nitrite gives the brown nitrosyl complex, iodide gives yellow

PbI X_{2}

, and acetate gives the deep red iron(III) acetate complex. So P-1, Q-2, R-3, S-4.