{"id":88485,"date":"2025-06-01T07:12:07","date_gmt":"2025-06-01T07:12:07","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=88485"},"modified":"2025-06-01T07:12:07","modified_gmt":"2025-06-01T07:12:07","slug":"which-one-of-the-following-statements-about-the-law-of-conservation-of","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-the-law-of-conservation-of\/","title":{"rendered":"Which one of the following statements about the law of conservation of"},"content":{"rendered":"

Which one of the following statements about the law of conservation of mass is correct?<\/p>\n

[amp_mcq option1=”A given compound always contains exactly same proportion of elements.” option2=”When gases combine in a reaction, they do so in a simple ratio by volume provided all gases are at room temperature.” option3=”Matter can neither be created nor destroyed.” option4=”Equal volumes of all gases at same temperature and pressure contain equal number of molecules.” correct=”option3″]<\/p>\n

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This question was previously asked in<\/div>\n
UPSC NDA-2 – 2018<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe Law of Conservation of Mass, first stated by Antoine Lavoisier, posits that mass is conserved in a chemical reaction or physical change. This means that the total mass of the reactants before a chemical reaction is equal to the total mass of the products after the reaction. The statement “Matter can neither be created nor destroyed” is a fundamental principle expressing this law.
\n<\/section>\n
\nThe Law of Conservation of Mass is a cornerstone of classical chemistry, stating that the total quantity of matter remains constant in an isolated system. It is often expressed as matter cannot be created or destroyed, though it can change form.
\n<\/section>\n
\nOption A describes the Law of Definite Proportions (Proust). Option B describes Gay-Lussac’s Law of Combining Volumes. Option D describes Avogadro’s Law. These are different fundamental laws of chemistry. While related to how matter behaves in chemical reactions, they are distinct from the Law of Conservation of Mass.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following statements about the law of conservation of mass is correct? [amp_mcq option1=”A given compound always contains exactly same proportion of elements.” option2=”When gases combine in a reaction, they do so in a simple ratio by volume provided all gases are at room temperature.” option3=”Matter can neither be created nor destroyed.” … <\/p>\n

Detailed SolutionWhich one of the following statements about the law of conservation of<\/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":[1114,1096,1155],"class_list":["post-88485","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-2","tag-1114","tag-chemistry","tag-physical-and-chemical-changes-solution","no-featured-image-padding"],"yoast_head":"\nWhich one of the following statements about the law of conservation of<\/title>\n<meta name=\"description\" content=\"The Law of Conservation of Mass, first stated by Antoine Lavoisier, posits that mass is conserved in a chemical reaction or physical change. This means that the total mass of the reactants before a chemical reaction is equal to the total mass of the products after the reaction. The statement "Matter can neither be created nor destroyed" is a fundamental principle expressing this law. The Law of Conservation of Mass is a cornerstone of classical chemistry, stating that the total quantity of matter remains constant in an isolated system. It is often expressed as matter cannot be created or destroyed, though it can change form.\" \/>\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-statements-about-the-law-of-conservation-of\/\" \/>\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 statements about the law of conservation of\" \/>\n<meta property=\"og:description\" content=\"The Law of Conservation of Mass, first stated by Antoine Lavoisier, posits that mass is conserved in a chemical reaction or physical change. This means that the total mass of the reactants before a chemical reaction is equal to the total mass of the products after the reaction. The statement "Matter can neither be created nor destroyed" is a fundamental principle expressing this law. The Law of Conservation of Mass is a cornerstone of classical chemistry, stating that the total quantity of matter remains constant in an isolated system. 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