Q.

The ratio of pure gold in 18 carat gold is -

A. 100%
B. 80%
C. 75%
D. 60%
Answer» C. 75%
Explanation: The gold content of alloys is measured in carats (k). Pure gold is designated as 24k where the ratio of pure gold is supposed to be 100 per cent. So 18 k gold will have pure gold ratio of 75 per cent.
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