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Which of the following chemical species is/ are diamagnetic as well as coloured?

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Hexafluoridoferrate(III) ion

Permanganate ion

Brown ring complex

Chromate ion

answer is B, D.

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Detailed Solution

The magnetic characteristics of a material may be established by looking at the electron structure: if the electrons are unpaired, the substance is paramagnetic; if all of the electrons are linked, the substance is diamagnetic.

Permanganate ion and Chromate ion chemical species are diamagnetic as well as coloured.

Hence correct options are b, d.

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