JEE Main 2016 Chemistry question

Find the metallic and ferromagnetic substance.

(1)
(2)
(3)
(4)Correct

Answer: (4)

Solution

is the one oxide in this list that is both metallic in its electrical conduction and ferromagnetic — option (4). Chromium is in the state (), and the band structure is such that the electrons are delocalised and spin-polarised, giving a half-metallic ferromagnet with a Curie temperature

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Question ID VK-115455