JEE Main levelSingle correct optionDifficulty 2 of 3qa212
Match the reaction in List I with the colour of the precipitate in List II.
List I: (i) IX− with Pb(NOX3)X2; (ii) SX2− with Pb(NOX3)X2; (iii) BrX− with AgNOX3; (iv) SOX4X2− with BaClX2.
List II: (p) black; (q) bright yellow; (r) pale yellow (cream); (s) white.
A(i)-(q), (ii)-(p), (iii)-(r), (iv)-(s)
B(i)-(r), (ii)-(p), (iii)-(q), (iv)-(s)
C(i)-(q), (ii)-(s), (iii)-(r), (iv)-(p)
D(i)-(s), (ii)-(p), (iii)-(q), (iv)-(r)
Answer: A
PbIX2 is bright yellow, PbS is black, AgBr is pale yellow (cream) and BaSOX4 is white. This gives (i)-(q), (ii)-(p), (iii)-(r), (iv)-(s).