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In how many of the following reactions one of the products is obtained as a black precipitate ? (i)Bi(OH)_3 darr +[Sn(OH)_4]^(2-)(aq)toProducts (ii)Bi^(3+)(aq)+I^(-)(aq)("not in excess")toProducts (iii)Bi^(3+)(aq)+H_2S(g)overset(H^+)toProducts (iv)[Bil_4]^(-)(aq)+H_2O(l)overset("dilution")toProducts (v)Bi^(3+)(aq)+C_9H_7ON(5%)+H^(+)(aq)+I^(-)(6M)to Products (vi)Bi^(3+)(aq)+C_6H_3(OH)_3(10%)toProducts (vii)BiO. OH darr + H_2O_2(aq)to Products |
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Answer» (ii)`Bi^(3+)(aq)+3I^(-)(aq)("not in excess")to Bil_3`(black) (iii)`2Bi^(3+)(aq)+3H_2S(g)overset(H^+)toBi_2S_3darr`(black)+`6H^(+)` (iv)`[Bil_4]^(-)(aq)+H_2O(l)overset("dilution")toBil_3darr`(black)+`I^(-)` (V)`Bi^(3+)(aq)+C_9H_7ON(5%)+H^(+)(aq)+4l^(-)(6M)toC_9H_7ON.HBil_4darr("red")` (vi)`Bi^(3+)(aq)+C_6H_3(OH)_3(10%)toBi(C_6H_3O_3)darr("YELLOW")+3H^(+)` (vii)`BiO. OHdarr+H_2O_2(aq)toBiO_3^(-)("yellowish-brown")+H^(+)+H_2O` |
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