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JEE Main 2025 Chemistry question

ChemistryCoordination CompoundsJEE Main 2025

Total number of molecules/species from following which will be paramagnetic is . O_2, O_2^+, O_2^-, NO, NO_2, CO, K_2[NiCl_4], [Co(NH_3)_6]Cl_3, K_2[Ni(CN)_4]

Answer: 6

Solution

O2, O2+, O2- (MOT unpaired electrons), NO, NO2 (odd electron species), K2[NiCl4]

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Question ID VK-002267