{"id":88959,"date":"2025-06-01T07:25:35","date_gmt":"2025-06-01T07:25:35","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=88959"},"modified":"2025-06-01T07:25:35","modified_gmt":"2025-06-01T07:25:35","slug":"which-one-of-the-following-acid-is-used-by-goldsmith-for-cleaning-of-g","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-acid-is-used-by-goldsmith-for-cleaning-of-g\/","title":{"rendered":"Which one of the following acid is used by goldsmith for cleaning of g"},"content":{"rendered":"

Which one of the following acid is used by goldsmith for cleaning of gold and silver articles ?<\/p>\n

[amp_mcq option1=”Sulphuric acid” option2=”Nitric acid” option3=”Hydrochloric acid” option4=”Phosphoric acid” correct=”option2″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-2 – 2023<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nB) Nitric acid is commonly used by goldsmiths for cleaning gold and silver articles.
\n<\/section>\n
\n– Goldsmiths often need to clean gold and silver items to remove tarnish, dirt, and oxidation.
\n– Tarnish on silver is typically silver sulfide (Ag\u2082S), and tarnish on gold can involve sulfides or oxides depending on the alloy.
\n– Nitric acid (HNO\u2083) is effective in dissolving many metal oxides and sulfides, including silver sulfide tarnish, while not significantly affecting the noble metals like gold and pure silver (though alloys might react).
\n<\/section>\n
\n– Hydrochloric acid (HCl) can also be used for cleaning certain metal surfaces but is less effective against silver sulfide than nitric acid.
\n– Sulphuric acid (H\u2082SO\u2084) is a strong acid but not typically preferred for cleaning jewellery tarnish compared to nitric or hydrochloric acid.
\n– Phosphoric acid (H\u2083PO\u2084) is a weaker acid used in some cleaning agents (like rust removers) but not commonly by goldsmiths for gold and silver tarnish.
\n– A mixture of concentrated nitric acid and concentrated hydrochloric acid (in a 1:3 ratio), known as Aqua Regia, is capable of dissolving gold and platinum. This is used for refining or testing gold, NOT for cleaning finished jewellery.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following acid is used by goldsmith for cleaning of gold and silver articles ? [amp_mcq option1=”Sulphuric acid” option2=”Nitric acid” option3=”Hydrochloric acid” option4=”Phosphoric acid” correct=”option2″] This question was previously asked in UPSC NDA-2 – 2023 Download PDFAttempt Online B) Nitric acid is commonly used by goldsmiths for cleaning gold and silver articles. … <\/p>\n

Detailed SolutionWhich one of the following acid is used by goldsmith for cleaning of g<\/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":[1094],"tags":[1105,1202,1096],"class_list":["post-88959","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-2","tag-1105","tag-acid-base-and-salt","tag-chemistry","no-featured-image-padding"],"yoast_head":"\nWhich one of the following acid is used by goldsmith for cleaning of g<\/title>\n<meta name=\"description\" content=\"B) Nitric acid is commonly used by goldsmiths for cleaning gold and silver articles. - Goldsmiths often need to clean gold and silver items to remove tarnish, dirt, and oxidation. - Tarnish on silver is typically silver sulfide (Ag\u2082S), and tarnish on gold can involve sulfides or oxides depending on the alloy. - Nitric acid (HNO\u2083) is effective in dissolving many metal oxides and sulfides, including silver sulfide tarnish, while not significantly affecting the noble metals like gold and pure silver (though alloys might react).\" \/>\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\/which-one-of-the-following-acid-is-used-by-goldsmith-for-cleaning-of-g\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which one of the following acid is used by goldsmith for cleaning of g\" \/>\n<meta property=\"og:description\" content=\"B) Nitric acid is commonly used by goldsmiths for cleaning gold and silver articles. - Goldsmiths often need to clean gold and silver items to remove tarnish, dirt, and oxidation. - Tarnish on silver is typically silver sulfide (Ag\u2082S), and tarnish on gold can involve sulfides or oxides depending on the alloy. - Nitric acid (HNO\u2083) is effective in dissolving many metal oxides and sulfides, including silver sulfide tarnish, while not significantly affecting the noble metals like gold and pure silver (though alloys might react).\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-acid-is-used-by-goldsmith-for-cleaning-of-g\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T07:25:35+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":"Which one of the following acid is used by goldsmith for cleaning of g","description":"B) Nitric acid is commonly used by goldsmiths for cleaning gold and silver articles. - 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