A) Al and Cu
B) Mg and Cu
C) Al and Mg
D) Al, Mg, Mn and Cu
Correct Answer: D
Solution :
Duralumin is an alloy of Al, Cu, Mg and Mn. It is light, strong and resistant to corrosion and is used in making aircraft bodies and pressure cooker. Alloy of Mg and Al is called magnalium which is very light and hard and is used for making balance beams and light instruments.
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