1.

In how many of the followingreactions, one of the products is obtained is a black precipitate ? i.Bi(OH)_(3)darr+[Sn(OH)_(4)]^(2-)._((aq))rarr Products ii.Bi^(3+) ._((aq)) + I^(Θ) ._((aq)) (not in excess) rarr Producets iii. Ag^(o+) ._((aq)) + H_(2)S_((g)) overset(H^(o+)) toProducets iv.[BiI_(4)]^(Θ)._((aq)) + H_(2)O_((I)) overset("Dilution") toProducts

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