JEE Main 2022 · 26 Jun · Shift 2 · Chemistry Q89

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ChemistryInteger+4 / -1Question 89 of 90

Reaction of $\mathrm{[Co(H_2O)_6]^{2+}}$ with excess ammonia and in the presence of oxygen results into a diamagnetic product. Number of electrons present in $t_{2g}$ -orbitals of the product is ______.

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Answer and worked solution

Official answer: 6

Product. Air oxidises Co(II) in ammonia to $\mathrm{[Co(NH_3)_6]^{3+}}$ , a low-spin $d^6$ complex: $t_{2g}^6e_g^0$ , diamagnetic.

Answer: 6

Topics:Crystal field theory Magnetic properties and colour

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JEE Main 2022 · 26 Jun · Shift 2, Chemistry question 89