A) solder
B) brass
C) bronze
D) belt metal
Correct Answer: A
Solution :
Solder is an alloy containing Pb (50%) and Sn (50%) which is a non-copper alloy. (Brass is Cu = 80%, Zn = 20%; bronze is Cu = 80%, Zn = 10%, Sn = 10%, bell metal is Cu = 80%, Sn = 20%)
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