The ratio of pure gold in 18 carat gold is:



[ A ]    75%
right
[ B ]    80%
[ C ]    90%
[ D ]    60%
Answer : Option A
Explanation :
75%.There are various grades of gold purity, determined by the ratio of their alloy composition & rated by a karat system. 18 karat gold consists of 75% gold & 25% alloy metals. Typical karat purities range from 10 karats to 24 karats (pure gold), with a wide variation of usage from country to country. 18 karat gold has been found to be the perfect balance between gold purity & strength. Brilliance offers a variety of exquisite 18 karat gold jewelry.
General Science MCQ Questions and Answers for competitive exams

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