Sclecr the corrcet srarcmenrs ahour Na2 S2 O3, 5 I 1, O. (a) It cannot used to remove stains of

step 1 In this problem, the only incorrect statement about N .A .2 .S .203 5S2O is it cannot use to rem

Sclecr the corrcet srarcmenrs ahour Na2 S2 O3, 5 I 1, O....

Sclecr the corrcet srarcmenrs ahour $\mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3}, 5 \mathrm{I} 1, \mathrm{O}$. (a) It cannot used to remove stains of $\mathrm{I}_{2}$. (b) It is also called as hypo. (c) It can be used as antichlor. (d) Ir is used in phocog mphy ro form complex wirh AgBr.

Sclecr the corrcet srarcmenrs ahour $\mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3}, 5 \mathrm{I} 1, \mathrm{O}$.
(a) It cannot used to remove stains of $\mathrm{I}_{2}$.
(b) It is also called as hypo.
(c) It can be used as antichlor.
(d) Ir is used in phocog mphy ro form complex wirh AgBr.

Key Concepts

Sodium Thiosulfate

Sodium thiosulfate is an inorganic compound widely used in various chemical applications. It is known for its reducing properties and its ability to react with halogens and other oxidizing agents. Its chemical reactivity underpins several practical uses in fields like photography, water treatment, and medical applications.

Common Names and Aliases (Hypo)

In many contexts, especially in photography, sodium thiosulfate is commonly known by its historical name 'hypo'. This alias reflects its long-established role as a photographic fixer, and the name is still used in many educational and industrial contexts to refer to this versatile compound.

Photographic Fixing and Complex Formation

In the photographic process, sodium thiosulfate serves as a fixer by dissolving unreacted silver halide crystals—such as silver bromide—through the formation of soluble silver thiosulfate complexes. This reaction is crucial for developing stable images by removing light-sensitive materials not reduced during exposure.

Antichlor Use in Water Treatment

Sodium thiosulfate is effective in neutralizing chlorine, making it a useful agent in antichlor applications. By reacting with chlorine present in water, it dechlorinates and thereby helps in processes where chlorine interference must be minimized, such as in monitoring or preserving certain chemical reactions.

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