MPSC Rajyaseva 2020 GS Paper 1 — Question 53
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खालील विधानांचा विचार करा : Consider the following statements :
(a)मृत प्राणी अथवा वनस्पती यांच्यामध्ये कार्बन - 14 ते कार्बन - 12 यांचे गुणोत्तर बदलत असते. / The ratio of 14C to 12C changes continuously for dead bodies or plants.
(b)किरणोत्सारी कार्बन - 14 समस्थानिकाचा वापर कार्बनी वयमापनामध्ये करतात. / Radioactive isotope Carbon-14 is used in a Carbon dating technique.
In dead plants or animals, radioactive Carbon-14 decays while stable Carbon-12 remains constant, causing the C-14 to C-12 ratio to change over time (statement a). This changing ratio is precisely why Carbon-14 isotope is used in carbon dating to determine the age of fossils (statement b). Thus, (a) is true and explains (b).
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