First slide

Applications of complexes

Question

Hypo is used to dissolve the undissolved silver halides to form a soluble complex. This is the principle involved in developing photographic films. The oxidation number and coordination number of central metal in the complex is

Moderate

A

+2, 4
B

+1, 4
C

+1, 2
D

+3, 6

Solution

$2 {Na}_{2} S_{2} O_{3} + AgBr \to {Na}_{3} [Ag {(S_{2} O_{3})}_{2}] + NaBr; Ox . state . . .' + 1'; C . No . . . . . 2;$

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