JEE Main 2024 Chemistry question
Identify correct statements from below: A. The chromate ion is square planar. B. Dichromates are generally prepared from chromates. C. The green manganate ion is diamagnetic. D. Dark green coloured K₂MnO₄ disproportionates in a neutral or acidic medium to give permanganate. E. With increasing oxidation number of transition metal, ionic character of the oxides decreases. Choose the correct answer from the options given below:
Answer: (A)
Solution
The chromate ion is tetrahedral, not square planar (A false). Dichromates are prepared by acidifying chromates (B true). The manganate ion MnO₄²⁻ has one unpaired electron and is
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