Transition and InnerTransition Elements - Result Question 16
17. Which of the following compounds is metallic and ferromagnetic?
(2016 Main)
(a) $CrO _2$
(b) $VO _2$
(c) $MnO _2$
(d) $TiO _2$
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Answer:
Correct Answer: 17. (a)
Solution:
Only three elements iron $(Fe)$, cobalt $(Co)$ and nickel $(Ni)$ show ferromagnetism at room temperature. $CrO _2$ is also a metallic and ferromagnetic compound which is used to make magnetic tapes for cassette recorders.
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