Solid State Question 270
Question: Which of the following pairs contain ferromagnetic and ferrimagnetic solids respectively-
Options:
A) $ Fe_2O_3,Fe_3O_4 $
B) $ Fe_3O_4,Cr_2O_3 $
C) $ CrO_2,Fe_3O_4 $
D) $ Cr_2O_3,CrO_2 $
Show Answer
Answer:
Correct Answer: C
Solution:
[c] $ F{{e}^{3+}},C{{r}^{3+}} $ shows paramagnetism whereas $ CrO_2 $ is attracted very strongly by a magnetic field but $ Fe_3O_4 $ (magnetic) is weakly attracted by magnetic field and hence show ferrimagnetism.
BETA
