A) Cu + Zn
B) Pb + Sb
C) Cu + Sn
D) Pb + Sn
Correct Answer: D
Solution :
Solder is an alloy of Sn (67%) and Pb (33%). It is used for soldering. Brass is made of Cu and Zn. Pb + Sb + Sn is called type metal which is used for making type for printing, Cu (86%), Sn (10%), Zn (4%) is gun metal used for making guns and gears.
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