{"id":87261,"date":"2025-06-01T06:38:52","date_gmt":"2025-06-01T06:38:52","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87261"},"modified":"2025-06-01T06:38:52","modified_gmt":"2025-06-01T06:38:52","slug":"the-chemical-used-as-a-fixer-developer-in-photography-is","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/the-chemical-used-as-a-fixer-developer-in-photography-is\/","title":{"rendered":"The chemical used as a fixer\/developer in photography is"},"content":{"rendered":"

The chemical used as a fixer\/developer in photography is<\/p>\n

[amp_mcq option1=”Sodium sulphate” option2=”Sodium sulphide” option3=”Sodium thiosulphate” option4=”Sodium sulphite” correct=”option3″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-1 – 2015<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct answer is Sodium thiosulphate. Sodium thiosulphate (Na\u2082S\u2082O\u2083), commonly known as “hypo”, is widely used as a fixer in traditional silver-halide photography.
\n<\/section>\n
\nIn photography, after development (where exposed silver halide is converted to metallic silver), the fixer bath is used to remove the *unexposed* silver halide crystals from the film or paper. Sodium thiosulphate dissolves these unexposed crystals, making the image permanent and no longer sensitive to light. While Sodium sulphite can be a component of developer solutions (as a preservative), Sodium thiosulphate is the primary chemical used as a *fixer*. Given the “fixer\/developer” phrasing and the options, sodium thiosulphate is the most definitive answer for a chemical used in one of these key steps, specifically fixing.
\n<\/section>\n
\nDeveloper solutions typically contain chemicals like Metol and Hydroquinone (reducing agents), Sodium sulphite (preservative), Borax (accelerator), and Potassium bromide (restrainer). Fixer solutions typically contain Sodium thiosulphate or Ammonium thiosulphate.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

The chemical used as a fixer\/developer in photography is [amp_mcq option1=”Sodium sulphate” option2=”Sodium sulphide” option3=”Sodium thiosulphate” option4=”Sodium sulphite” correct=”option3″] This question was previously asked in UPSC NDA-1 – 2015 Download PDFAttempt Online The correct answer is Sodium thiosulphate. Sodium thiosulphate (Na\u2082S\u2082O\u2083), commonly known as “hypo”, is widely used as a fixer in traditional silver-halide photography. … <\/p>\n

Detailed SolutionThe chemical used as a fixer\/developer in photography is<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1093],"tags":[1443,1096,1115],"class_list":["post-87261","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1443","tag-chemistry","tag-miscellaneous","no-featured-image-padding"],"yoast_head":"\nThe chemical used as a fixer\/developer in photography is<\/title>\n<meta name=\"description\" content=\"The correct answer is Sodium thiosulphate. Sodium thiosulphate (Na\u2082S\u2082O\u2083), commonly known as "hypo", is widely used as a fixer in traditional silver-halide photography. In photography, after development (where exposed silver halide is converted to metallic silver), the fixer bath is used to remove the *unexposed* silver halide crystals from the film or paper. Sodium thiosulphate dissolves these unexposed crystals, making the image permanent and no longer sensitive to light. While Sodium sulphite can be a component of developer solutions (as a preservative), Sodium thiosulphate is the primary chemical used as a *fixer*. Given the "fixer\/developer" phrasing and the options, sodium thiosulphate is the most definitive answer for a chemical used in one of these key steps, specifically fixing.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/the-chemical-used-as-a-fixer-developer-in-photography-is\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The chemical used as a fixer\/developer in photography is\" \/>\n<meta property=\"og:description\" content=\"The correct answer is Sodium thiosulphate. Sodium thiosulphate (Na\u2082S\u2082O\u2083), commonly known as "hypo", is widely used as a fixer in traditional silver-halide photography. In photography, after development (where exposed silver halide is converted to metallic silver), the fixer bath is used to remove the *unexposed* silver halide crystals from the film or paper. Sodium thiosulphate dissolves these unexposed crystals, making the image permanent and no longer sensitive to light. While Sodium sulphite can be a component of developer solutions (as a preservative), Sodium thiosulphate is the primary chemical used as a *fixer*. Given the "fixer\/developer" phrasing and the options, sodium thiosulphate is the most definitive answer for a chemical used in one of these key steps, specifically fixing.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/the-chemical-used-as-a-fixer-developer-in-photography-is\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:38:52+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"The chemical used as a fixer\/developer in photography is","description":"The correct answer is Sodium thiosulphate. Sodium thiosulphate (Na\u2082S\u2082O\u2083), commonly known as \"hypo\", is widely used as a fixer in traditional silver-halide photography. In photography, after development (where exposed silver halide is converted to metallic silver), the fixer bath is used to remove the *unexposed* silver halide crystals from the film or paper. Sodium thiosulphate dissolves these unexposed crystals, making the image permanent and no longer sensitive to light. While Sodium sulphite can be a component of developer solutions (as a preservative), Sodium thiosulphate is the primary chemical used as a *fixer*. Given the \"fixer\/developer\" phrasing and the options, sodium thiosulphate is the most definitive answer for a chemical used in one of these key steps, specifically fixing.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/the-chemical-used-as-a-fixer-developer-in-photography-is\/","og_locale":"en_US","og_type":"article","og_title":"The chemical used as a fixer\/developer in photography is","og_description":"The correct answer is Sodium thiosulphate. Sodium thiosulphate (Na\u2082S\u2082O\u2083), commonly known as \"hypo\", is widely used as a fixer in traditional silver-halide photography. In photography, after development (where exposed silver halide is converted to metallic silver), the fixer bath is used to remove the *unexposed* silver halide crystals from the film or paper. Sodium thiosulphate dissolves these unexposed crystals, making the image permanent and no longer sensitive to light. While Sodium sulphite can be a component of developer solutions (as a preservative), Sodium thiosulphate is the primary chemical used as a *fixer*. Given the \"fixer\/developer\" phrasing and the options, sodium thiosulphate is the most definitive answer for a chemical used in one of these key steps, specifically fixing.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/the-chemical-used-as-a-fixer-developer-in-photography-is\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T06:38:52+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/the-chemical-used-as-a-fixer-developer-in-photography-is\/","url":"https:\/\/exam.pscnotes.com\/mcq\/the-chemical-used-as-a-fixer-developer-in-photography-is\/","name":"The chemical used as a fixer\/developer in photography is","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T06:38:52+00:00","dateModified":"2025-06-01T06:38:52+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct answer is Sodium thiosulphate. Sodium thiosulphate (Na\u2082S\u2082O\u2083), commonly known as \"hypo\", is widely used as a fixer in traditional silver-halide photography. In photography, after development (where exposed silver halide is converted to metallic silver), the fixer bath is used to remove the *unexposed* silver halide crystals from the film or paper. Sodium thiosulphate dissolves these unexposed crystals, making the image permanent and no longer sensitive to light. While Sodium sulphite can be a component of developer solutions (as a preservative), Sodium thiosulphate is the primary chemical used as a *fixer*. 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