Standard 18-carat gold sold in the market contains:
A
82 parts gold and 18 parts other metals
B
18 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
Correct Answer: Option C
Explanation
1. The purity of gold is measured in carats (karat), where 24-carat gold is considered pure gold (almost 100%).
2. 18-carat gold means that out of a total of 24 parts by weight, 18 parts are pure gold, and the remaining parts are other metals (like copper, silver, nickel, zinc) added to form an alloy, usually to increase hardness and durability.
3. The remaining parts would be 24 - 18 = 6 parts other metals.
4. Therefore, standard 18-carat gold contains 18 parts gold and 6 parts other metals.