1.

Column(I) contains some reagents which when taken in excess produce precipitate with radical given in column (II).Accordingly match the column (I) with column (II). `{:(underset(("Reagent"))(Column-I),underset(("Radical"))(Column-II)),((A)KCN(aq),(p)Pb^(2+)),((B)NaOH(aq),(q)Ag^(+)),((C )Kl(aq),(r)Hg_2^(2+)),((D)K_2CrO_4(aq),(s)Cu^(2+)):}`

Answer» Correct Answer - A`to`p,r ; B`to`q,r,s ; C`to`p,q,r,s ; D`to`p,q,r
(A)`Pb (CN)_2darr` white , not soluble in excess to reagent. `AgCNdarr` white soluble in excess of reagent
`Hg+Hg(CN)_2darr` black, not soluble in excess reagent, `Cu(CN)_2darr` (yellow) `overset("Excess")toK_3[Cu(CN)_4]` (soluble complex)
(B)`Pb(OH)_2darr` white `overset("Excess")(Na_2)[Pb(OH)_4]`(soluble complex )
`Ag_2Odarr` brown, `Hg_2Odarr` black, `Cu(OH)_2darr` blue
(C )`Pbl_2darr`yellow `overset("Excess")to [Pbl_4]^(2-)` soluble complex only with concentrated solution of KI(4M).
`AgIdarr`yellow `overset("excess")to` No reaction
`Hg_2l_2darr"Green"overset("Excess")to[Hgl_4]^(-)+Hgdarr`black
`ubrace(Cu l darrwhite+I_3^(-))to`white ppt in brown coloured solution
(D)`PbCrO_4darr`yellow
`Ag_2CrO_4darr`(brick red/brownish red)
`Hg_2CrO_4darr` red (with hot soluton of `K_2CrO_4`)
In cold, brown precipitate is obtained


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