Which of the following is an alloy of rare earth elements?
-
Nisil
-
Mischmetal
-
Terne
-
Spiegeleisen
B
Correct answer
Explanation
Mischmetal is an alloy of rare earth elements in various naturally-occurring proportions. A typical composition includes approximately 50% cerium and 25% lanthanum, with small amounts of neodymium and praseodymium. Its most common use is in the flint ignition device of many lighters and torches.