Which of these is an alloy? A. Brass B. Iron C. Phosphorus D. Silicon
The purity of precious metal Gold is measured in Carat. Which of the following refers to a Gold alloy having 75 percent of Gold and rest 25 percent of other metals ?
(A) 18 carat Gold (B) 20 carat Gold (C) 22 carat Gold (D) 24 carat Gold
