{"id":84634,"date":"2025-06-01T02:42:11","date_gmt":"2025-06-01T02:42:11","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=84634"},"modified":"2025-06-01T02:42:11","modified_gmt":"2025-06-01T02:42:11","slug":"which-one-of-the-following-is-a-physical-change","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-a-physical-change\/","title":{"rendered":"Which one of the following is a physical change?"},"content":{"rendered":"

Which one of the following is a physical change?<\/p>\n

[amp_mcq option1=”Burning of coal” option2=”Burning of wood” option3=”Heating of a platinum crucible” option4=”Heating of potassium chlorate” correct=”option3″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CDS-1 – 2017<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct answer is C) Heating of a platinum crucible.
\n<\/section>\n
\nA physical change is a change in the form of a substance, but not in its chemical identity. Chemical changes involve a chemical reaction where new substances are formed.
\n– Burning of coal and wood are combustion reactions where the substance reacts with oxygen to form ash, carbon dioxide, etc. These are chemical changes.
\n– Heating of potassium chlorate (KClO\u2083) typically refers to its thermal decomposition, which produces potassium chloride (KCl) and oxygen (O\u2082). This is a chemical change.
\n– Heating a platinum crucible: Platinum is a very noble (unreactive) metal. Heating it, even to high temperatures in air, usually only changes its temperature or potentially causes thermal expansion or changes in its physical state (if heated to melting point). It does not readily undergo a chemical reaction or decomposition under normal heating conditions in a lab. Therefore, heating a platinum crucible is primarily a physical change.
\n<\/section>\n
\nPhysical changes are often reversible (e.g., melting\/freezing water). Chemical changes are usually irreversible without further chemical reactions. Recognizing chemical changes often involves looking for signs like color change, gas evolution, precipitate formation, or significant energy change (heat\/light).
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following is a physical change? [amp_mcq option1=”Burning of coal” option2=”Burning of wood” option3=”Heating of a platinum crucible” option4=”Heating of potassium chlorate” correct=”option3″] This question was previously asked in UPSC CDS-1 – 2017 Download PDFAttempt Online The correct answer is C) Heating of a platinum crucible. A physical change is a change … <\/p>\n

Detailed SolutionWhich one of the following is a physical change?<\/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":[1087],"tags":[1101,1096,1155],"class_list":["post-84634","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-1","tag-1101","tag-chemistry","tag-physical-and-chemical-changes-solution","no-featured-image-padding"],"yoast_head":"\nWhich one of the following is a physical change?<\/title>\n<meta name=\"description\" content=\"The correct answer is C) Heating of a platinum crucible. A physical change is a change in the form of a substance, but not in its chemical identity. Chemical changes involve a chemical reaction where new substances are formed. - Burning of coal and wood are combustion reactions where the substance reacts with oxygen to form ash, carbon dioxide, etc. These are chemical changes. - Heating of potassium chlorate (KClO\u2083) typically refers to its thermal decomposition, which produces potassium chloride (KCl) and oxygen (O\u2082). This is a chemical change. - Heating a platinum crucible: Platinum is a very noble (unreactive) metal. Heating it, even to high temperatures in air, usually only changes its temperature or potentially causes thermal expansion or changes in its physical state (if heated to melting point). It does not readily undergo a chemical reaction or decomposition under normal heating conditions in a lab. Therefore, heating a platinum crucible is primarily a physical change.\" \/>\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-is-a-physical-change\/\" \/>\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 is a physical change?\" \/>\n<meta property=\"og:description\" content=\"The correct answer is C) Heating of a platinum crucible. A physical change is a change in the form of a substance, but not in its chemical identity. Chemical changes involve a chemical reaction where new substances are formed. - Burning of coal and wood are combustion reactions where the substance reacts with oxygen to form ash, carbon dioxide, etc. These are chemical changes. - Heating of potassium chlorate (KClO\u2083) typically refers to its thermal decomposition, which produces potassium chloride (KCl) and oxygen (O\u2082). This is a chemical change. - Heating a platinum crucible: Platinum is a very noble (unreactive) metal. Heating it, even to high temperatures in air, usually only changes its temperature or potentially causes thermal expansion or changes in its physical state (if heated to melting point). It does not readily undergo a chemical reaction or decomposition under normal heating conditions in a lab. Therefore, heating a platinum crucible is primarily a physical change.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-a-physical-change\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T02:42:11+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 is a physical change?","description":"The correct answer is C) Heating of a platinum crucible. A physical change is a change in the form of a substance, but not in its chemical identity. Chemical changes involve a chemical reaction where new substances are formed. - Burning of coal and wood are combustion reactions where the substance reacts with oxygen to form ash, carbon dioxide, etc. These are chemical changes. - Heating of potassium chlorate (KClO\u2083) typically refers to its thermal decomposition, which produces potassium chloride (KCl) and oxygen (O\u2082). This is a chemical change. - Heating a platinum crucible: Platinum is a very noble (unreactive) metal. Heating it, even to high temperatures in air, usually only changes its temperature or potentially causes thermal expansion or changes in its physical state (if heated to melting point). It does not readily undergo a chemical reaction or decomposition under normal heating conditions in a lab. Therefore, heating a platinum crucible is primarily a physical change.","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-is-a-physical-change\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following is a physical change?","og_description":"The correct answer is C) Heating of a platinum crucible. A physical change is a change in the form of a substance, but not in its chemical identity. Chemical changes involve a chemical reaction where new substances are formed. - Burning of coal and wood are combustion reactions where the substance reacts with oxygen to form ash, carbon dioxide, etc. These are chemical changes. - Heating of potassium chlorate (KClO\u2083) typically refers to its thermal decomposition, which produces potassium chloride (KCl) and oxygen (O\u2082). This is a chemical change. - Heating a platinum crucible: Platinum is a very noble (unreactive) metal. Heating it, even to high temperatures in air, usually only changes its temperature or potentially causes thermal expansion or changes in its physical state (if heated to melting point). It does not readily undergo a chemical reaction or decomposition under normal heating conditions in a lab. Therefore, heating a platinum crucible is primarily a physical change.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-a-physical-change\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T02:42:11+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-is-a-physical-change\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-a-physical-change\/","name":"Which one of the following is a physical change?","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T02:42:11+00:00","dateModified":"2025-06-01T02:42:11+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct answer is C) Heating of a platinum crucible. A physical change is a change in the form of a substance, but not in its chemical identity. Chemical changes involve a chemical reaction where new substances are formed. - Burning of coal and wood are combustion reactions where the substance reacts with oxygen to form ash, carbon dioxide, etc. These are chemical changes. - Heating of potassium chlorate (KClO\u2083) typically refers to its thermal decomposition, which produces potassium chloride (KCl) and oxygen (O\u2082). This is a chemical change. - Heating a platinum crucible: Platinum is a very noble (unreactive) metal. Heating it, even to high temperatures in air, usually only changes its temperature or potentially causes thermal expansion or changes in its physical state (if heated to melting point). It does not readily undergo a chemical reaction or decomposition under normal heating conditions in a lab. 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