Which of the following is not an alloy?
A
Duralumin
B
Bismuth
C
Magnalium
D
Alnico
Correct Answer: Bismuth
Bismuth is a metal with symbol Bi and atomic number 83. Duralimn is an alloy of copper, magnalium is an alloy of magnesium and Alnico is an alloy of aluminium, copper and cobalt.