Question
Which of the following compounds is metallic and ferromagnetic?
-
VO2
-
MnO2
-
TiO2
-
CrO2
Solution
D.
CrO2
Only three elements iron (Fe) cobalt (Co) and Nickel (Ni) show ferromagnetism at room temperature. CrO2 is also a metallic and ferromagnetic compound which is used to make magnetic tapes for cassette recorders