Question

The percentage impurities present in 22 carat gold is

• A.
  $8.33\%$
• B.
  $91.67\%$
• C.
  $16.67\%$
• D.
  $10\%$

Answer 1

The correct option is A

$8.33\%$
Pure gold, known as 24-carat gold, is very soft. Therefore, 22-carat gold is used for making ornaments. It means that 22 parts of pure gold are alloyed with 2 parts of either copper or silver i.e. impurities.

So, of impurities present in 22 carat gold =$\frac{2}{24}\times 100=8.33\%$

Hence, the correct answer is option (a).