Match the radicals mentioned in list-I with their reactions mentioned in list-II & answer the following. List - I (I) Fe^2+ (II) Hg^2+ (III) Pb^2+ (IV) Ag^+ List - II (P) Forms precipitate with KCN, w

Question

Match the radicals mentioned in list-I with their reactions mentioned in list-II & answer the following.

List - I
(I) Fe^2+
(II) Hg^2+
(III) Pb^2+
(IV) Ag^+

List - II
(P) Forms precipitate with KCN, which is soluble in excess of the reagent.
(Q) Forms precipitate with NaOH and NH4OH, which is insoluble in both excess of reagent.
(R) forms coloured precipitate with KI, which is soluble in excess of reagent.
(S) forms black precipitate with H2S which is soluble in hot and dilute HNO3.
(T) Forms red colouration with NaSCN

The correct combination out of the following is

Prashant Kotian · Accepted Answer

Correct answer: CD. The bond order of graphite is 1.5 and that of diamond is one. Graphite is more stable than diamond.

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