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Stoichiometry

To a metal ni...

Question

To a metal nitrate, when KI solution is added, a black ppt. is produced at first, on adding excess of KI orange solution is produced. Metal chloride gives white turbidity on dilution. Metal belongs to nth A group and mth period of periodic table. Then value of m + n is

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Solution

Metal is Bi

$B i (N O_{3}) + 3 K I \to B i I_{3} + 3 K N O_{3}$

$B i I_{3} + K I \to K (B i I_{4})$

Metal is bismuth period is 6 group is 5 A

m + n = 5 + 6 = 11

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