Which of the following reagent is used as fixer in photography?

A g B r

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A g N O_{3}

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N a_{2} S_{2} O_{3} \cdot 5 H_{2} O

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Both A and C

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Solution

The correct option is A $N a_{2} S_{2} O_{3} \cdot 5 H_{2} O$
$N a_{2} S_{2} O_{3}$ (as fixer) dissolves unreacted $A g B r$ as:
$2 N a_{2} S_{2} O_{3} + A g B r \to N a_{3} [A g (S_{2} O_{3})_{2}] + N a B r$

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Similar questions

N a_{2} S_{2} O_{3} \cdot 5 H_{2} O

{N a}_{2} S_{2} O_{3}

N a_{2} S_{2} O_{3}

A g B r

{N a}_{2} S_{2} O_{3}

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