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UPSC 2004: Standard 18-carat gold sold in the market contains
(a)82 parts gold and 18 parts other metals
(b)15 parts gold and 82 parts other metals
(c)18 parts gold and 6 parts other metals
(d)9 parts gold and 15 parts other metals
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Not attemptedCorrect Answer: (c) 18 parts gold and 6 parts other metals
A “carat” (or karat) is 1⁄24 part of the mass of a gold alloy. Hence 18-carat gold contains 18 parts pure gold and 6 parts alloying metals (18 / 24 = 75 % purity). Options (a), (b) and (d) do not match this 18:6 ratio. ([en.wikipedia.org](https://en.wikipedia.org/wiki/Fineness?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2004 Science & Technology question?▼
The correct answer is option (c): 18 parts gold and 6 parts other metals. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Materials & Engineering question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2004, GS Paper 1, as Question 127. It falls under Science & Technology > Materials & Engineering.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Materials & Engineering?▼
UPSC has asked 23 questions from Materials & Engineering (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.