UPSC Prelims 2004·GS1·science-and-technology·materials and robotics

Standard 18-carat gold sold in the market contains:

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Last updated 23 May 2026, 3:31 pm IST
  1. A82 parts gold and 18 parts other metals
  2. B18 parts gold and 82 parts other metals
  3. C18 parts gold and 6 parts other metalsCorrect
  4. D9 parts gold and 15 parts other metals

Explanation

The purity of gold is measured in carats where 24 carat represents 100 percent pure gold. Therefore 1 carat equals 1 part out of 24. Standard 18 carat gold means that out of a total of 24 parts, 18 parts are pure gold and the remaining 6 parts are other metals like copper or silver. This ratio ensures the gold is durable enough for jewelry. Option C correctly reflects this 18 to 6 ratio which totals 24 parts.
science-and-technology: Standard 18-carat gold sold in the market contains
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