Which of the following reactions is involved in black and white photography?

2 C u + O_{2} \to Δ 2 C u O

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2 A g B r S u n l i g h t - ---- \to 2 A g + B r_{2}

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Z n O + C \to Z n + C O

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C a C O_{3} \to Δ C a O + C O_{2}

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Solution

The correct option is B $2 A g B r S u n l i g h t - ---- \to 2 A g + B r_{2}$
The reaction $2 A g B r (s) S u n l i g h t - ---- \to 2 A g (s) + B r_{2} (l)$ is involved in black and white photography.

It is a redox reaction in which $B r^{-}$ transfers an electron to $A g^{+}$ forming elemental silver.

Black and white photography mainly depends upon the light-sensitive material that helps in forming such contrasting images.

That material is AgBr.

When exposed to AgBr, the image then forms in the film.

While the image is developing, sodium sulphate, an oxidised reducing agent converts the AgBr remains into the visible metallic surface.

Hence, the correct option is $B$

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Similar questions

What type of reaction involved in black and white photography.

Name the type of reaction involved in black and white photography.

Which statement is correct about the following reaction?
$Z n O$ + $C O \to$ $Z n$ + $C O_{2}$

Z n O + C O \to Z n + C O_{2}

2 A g^{+} + 2 B r^{-} \to 2 A g + B r_{2}

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