Na 2 S 2 O 3 - 5 H 2 O is used in photography to-

The correct option is B Remove undecomposed AgBr as a soluble complex Na _ 2 S _ 2 O _ 3 · 5 H _ 2 O is used in photography to remove undecomposed ...

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Standard XII

Chemistry

Nitric Acid

Na 2 S 2 O 3 ...

Question

${N a}_{2} S_{2} O_{3} \cdot 5 H_{2} O$ is used in photography to:

Reduce

A g B r

to metallic

A g

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Remove reduced

A g

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Remove undecomposed

A g B r

as a soluble complex

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Converts metallic

A g

to silver salt

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Solution

The correct option is B Remove undecomposed $A g B r$ as a soluble complex
${N a}_{2} S_{2} O_{3} \cdot 5 H_{2} O$ is used in photography to remove undecomposed $A g B r$ as a soluble complex.

${N a}_{2} S_{2} O_{3}$ $+$ $A g B r$ $\to$ $N a_{3} [A g (S_{2} O_{3})_{2}] + N a B r$

It is also used for fixing films and prints.

So, the correct option is $C$

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

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Q. From the following information, calculate the solubility product of AgBr.

A g B r (s) + e^{-} \to A g (s) + B r^{⊖} (a q); E^{⊖} = 0.07 V

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is washed away by complexation of

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

is used in photography because of its:

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Na2S2O3⋅5H2O is used in photography to:

The correct option is B Remove undecomposed AgBr as a soluble complexNa2S2O3⋅5H2O is used in photography to remove undecomposed AgBr as a soluble complex.Na2S2O3 + AgBr → Na3[Ag(S2O3)2]+NaBrIt is also used for fixing films and prints.So, the correct option is C

${N a}_{2} S_{2} O_{3} \cdot 5 H_{2} O$ is used in photography to: