{"id":87763,"date":"2025-06-01T06:53:43","date_gmt":"2025-06-01T06:53:43","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87763"},"modified":"2025-06-01T06:53:43","modified_gmt":"2025-06-01T06:53:43","slug":"which-one-of-the-following-reactions-does-not-result-in-the-evolutio","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-reactions-does-not-result-in-the-evolutio\/","title":{"rendered":"Which one of the following reactions does not result in the evolutio"},"content":{"rendered":"

Which one of the following reactions does not<\/b> result in the evolution of hydrogen gas ?<\/p>\n

[amp_mcq option1=”Reaction of zinc metal with dilute sulphuric acid solution” option2=”Mixing water to Plaster of Paris” option3=”Heating zinc metal with sodium hydroxide solution” option4=”Reaction of potassium metal with water” correct=”option2″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-1 – 2021<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nMixing water with Plaster of Paris (Calcium sulfate hemihydrate, CaSO\u2084\u00b7\u00bdH\u2082O) results in a hydration reaction where water is absorbed to form gypsum (Calcium sulfate dihydrate, CaSO\u2084\u00b72H\u2082O). This reaction is exothermic and causes the mixture to set and harden, but it does not produce any gas, including hydrogen.
\n<\/section>\n
\nThe reactions in options A, C, and D all involve the liberation of hydrogen gas:
\nA) Active metals like zinc react with dilute acids (Zn + H\u2082SO\u2084 \u2192 ZnSO\u2084 + H\u2082).
\nC) Amphoteric metals like zinc react with strong bases upon heating (Zn + 2NaOH \u2192 Na\u2082ZnO\u2082 + H\u2082).
\nD) Highly reactive metals like potassium react vigorously with water (2K + 2H\u2082O \u2192 2KOH + H\u2082).
\n<\/section>\n
\nPlaster of Paris is commonly used in construction, casting, and medical applications (like casts for broken bones) due to its ability to quickly set after mixing with water. The setting process involves the crystallization of gypsum.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following reactions does not result in the evolution of hydrogen gas ? [amp_mcq option1=”Reaction of zinc metal with dilute sulphuric acid solution” option2=”Mixing water to Plaster of Paris” option3=”Heating zinc metal with sodium hydroxide solution” option4=”Reaction of potassium metal with water” correct=”option2″] This question was previously asked in UPSC NDA-1 – … <\/p>\n

Detailed SolutionWhich one of the following reactions does not result in the evolutio<\/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":[1110,1096,1161],"class_list":["post-87763","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1110","tag-chemistry","tag-hydrogen-and-its-compounds","no-featured-image-padding"],"yoast_head":"\nWhich one of the following reactions does not result in the evolutio<\/title>\n<meta name=\"description\" content=\"Mixing water with Plaster of Paris (Calcium sulfate hemihydrate, CaSO\u2084\u00b7\u00bdH\u2082O) results in a hydration reaction where water is absorbed to form gypsum (Calcium sulfate dihydrate, CaSO\u2084\u00b72H\u2082O). This reaction is exothermic and causes the mixture to set and harden, but it does not produce any gas, including hydrogen. The reactions in options A, C, and D all involve the liberation of hydrogen gas: A) Active metals like zinc react with dilute acids (Zn + H\u2082SO\u2084 \u2192 ZnSO\u2084 + H\u2082). C) Amphoteric metals like zinc react with strong bases upon heating (Zn + 2NaOH \u2192 Na\u2082ZnO\u2082 + H\u2082). D) Highly reactive metals like potassium react vigorously with water (2K + 2H\u2082O \u2192 2KOH + H\u2082).\" \/>\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-reactions-does-not-result-in-the-evolutio\/\" \/>\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 reactions does not result in the evolutio\" \/>\n<meta property=\"og:description\" content=\"Mixing water with Plaster of Paris (Calcium sulfate hemihydrate, CaSO\u2084\u00b7\u00bdH\u2082O) results in a hydration reaction where water is absorbed to form gypsum (Calcium sulfate dihydrate, CaSO\u2084\u00b72H\u2082O). This reaction is exothermic and causes the mixture to set and harden, but it does not produce any gas, including hydrogen. The reactions in options A, C, and D all involve the liberation of hydrogen gas: A) Active metals like zinc react with dilute acids (Zn + H\u2082SO\u2084 \u2192 ZnSO\u2084 + H\u2082). C) Amphoteric metals like zinc react with strong bases upon heating (Zn + 2NaOH \u2192 Na\u2082ZnO\u2082 + H\u2082). D) Highly reactive metals like potassium react vigorously with water (2K + 2H\u2082O \u2192 2KOH + H\u2082).\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-reactions-does-not-result-in-the-evolutio\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:53:43+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 reactions does not result in the evolutio","description":"Mixing water with Plaster of Paris (Calcium sulfate hemihydrate, CaSO\u2084\u00b7\u00bdH\u2082O) results in a hydration reaction where water is absorbed to form gypsum (Calcium sulfate dihydrate, CaSO\u2084\u00b72H\u2082O). This reaction is exothermic and causes the mixture to set and harden, but it does not produce any gas, including hydrogen. The reactions in options A, C, and D all involve the liberation of hydrogen gas: A) Active metals like zinc react with dilute acids (Zn + H\u2082SO\u2084 \u2192 ZnSO\u2084 + H\u2082). C) Amphoteric metals like zinc react with strong bases upon heating (Zn + 2NaOH \u2192 Na\u2082ZnO\u2082 + H\u2082). D) Highly reactive metals like potassium react vigorously with water (2K + 2H\u2082O \u2192 2KOH + H\u2082).","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\/which-one-of-the-following-reactions-does-not-result-in-the-evolutio\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following reactions does not result in the evolutio","og_description":"Mixing water with Plaster of Paris (Calcium sulfate hemihydrate, CaSO\u2084\u00b7\u00bdH\u2082O) results in a hydration reaction where water is absorbed to form gypsum (Calcium sulfate dihydrate, CaSO\u2084\u00b72H\u2082O). This reaction is exothermic and causes the mixture to set and harden, but it does not produce any gas, including hydrogen. The reactions in options A, C, and D all involve the liberation of hydrogen gas: A) Active metals like zinc react with dilute acids (Zn + H\u2082SO\u2084 \u2192 ZnSO\u2084 + H\u2082). C) Amphoteric metals like zinc react with strong bases upon heating (Zn + 2NaOH \u2192 Na\u2082ZnO\u2082 + H\u2082). D) Highly reactive metals like potassium react vigorously with water (2K + 2H\u2082O \u2192 2KOH + H\u2082).","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-reactions-does-not-result-in-the-evolutio\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T06:53:43+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\/which-one-of-the-following-reactions-does-not-result-in-the-evolutio\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-reactions-does-not-result-in-the-evolutio\/","name":"Which one of the following reactions does not result in the evolutio","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T06:53:43+00:00","dateModified":"2025-06-01T06:53:43+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Mixing water with Plaster of Paris (Calcium sulfate hemihydrate, CaSO\u2084\u00b7\u00bdH\u2082O) results in a hydration reaction where water is absorbed to form gypsum (Calcium sulfate dihydrate, CaSO\u2084\u00b72H\u2082O). This reaction is exothermic and causes the mixture to set and harden, but it does not produce any gas, including hydrogen. The reactions in options A, C, and D all involve the liberation of hydrogen gas: A) Active metals like zinc react with dilute acids (Zn + H\u2082SO\u2084 \u2192 ZnSO\u2084 + H\u2082). C) Amphoteric metals like zinc react with strong bases upon heating (Zn + 2NaOH \u2192 Na\u2082ZnO\u2082 + H\u2082). 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