Column(I) contains some reagents which when taken in excess produce precipitate with radical given in column (II).Accordingly match the column (I) wit

Question

Column(I) contains some reagents which when taken in excess produce precipitate with radical given in column (II).Accordingly match the column (I) wit

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+)):}`

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

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