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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)to`Products (ii)`Bi^(3+)(aq)+I^(-)(aq)("not in excess")to`Products (iii)`Bi^(3+)(aq)+H_2S(g)overset(H^+)to`Products (iv)`[Bil_4]^(-)(aq)+H_2O(l)overset("dilution")to`Products (v)`Bi^(3+)(aq)+C_9H_7ON(5%)+H^(+)(aq)+I^(-)(6M)to` Products (vi)`Bi^(3+)(aq)+C_6H_3(OH)_3(10%)to`Products (vii)`BiO. OH darr + H_2O_2(aq)to` Products |
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Answer» Correct Answer - 4 (i)`2Bi(OH)_3darr+3[Sn(OH)_4]^(2-)(aq)to2Bidarr("black")+3[Sn(OH)_6]^(2-)` (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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