JEE Main 2020 · ChemistryMultiple choiceSingle correctMediumCalculation

JEE Main 5 September 2020, Shift 1, Chemistry Q38

Question 38 of 75 in this shift, Chemistry question 13 of 25.

The values of the crystal field stabilization energies for a high spin

\mathrm{d^6}

metal ion in octahedral and tetrahedral fields, respectively, are :

(1) $-0.4\ \Delta_o$ and $-0.6\ \Delta_t$ Official answer
(2) $-2.4\ \Delta_o$ and $-0.6\ \Delta_t$
(3) $-1.6\ \Delta_o$ and $-0.4\ \Delta_t$
(4) $-0.4\ \Delta_o$ and $-0.27\ \Delta_t$

Official answer

Option 1

NTA final key (Sep 2020).

Chapter: Coordination Compounds
Topic: Crystal Field Theory
Idea tested: CFSE Calculation

Same idea in other shifts

Asked 11× in all

6 Apr 2026, Shift 1 · Q61Match the LIST-I with LIST-II List-I (Electronic configuration of tetrahedral metal ion) | List-II (Crystal Field Stabilization Energy…MediumMatch the list
2 Apr 2025, Shift 2 · Q60The d-orbital electronic configuration of the complex among $\mathrm{[Co(en)_3]^{3+}}$ , $\mathrm{[CoF_6]^{3-}}$ ,…MediumSingle correct
10 Apr 2023, Shift 2 · Q70Match List I with List II LIST I (Complex) A. $[\mathrm{Ti(H_2O)_6}]^{2+}$ B. $[\mathrm{V(H_2O)_6}]^{2+}$ C. $[\mathrm{Mn(H_2O)_6}]^{3+}$ …MediumMatch the list
12 Apr 2023, Shift 1 · Q72Match List I with List II LIST I (Complex) / LIST II (CFSE ( $\Delta_o$ )) A. $\mathrm{[Cu(NH_3)_6]^{2+}}$ - I. $-0.6$ B.…MediumMatch the list
29 Jul 2022, Shift 1 · Q90 $\mathrm{[Fe(CN)_6]^{3-}}$ should be an inner orbital complex. Ignoring the pairing energy, the value of crystal field stabilization…MediumNumerical value
27 Jun 2022, Shift 1 · Q71Which of the following will have maximum stabilization due to crystal field ?MediumSingle correct
26 Aug 2021, Shift 2 · Q39Arrange the following Cobalt complexes in the order of increasing Crystal Field Stabilization Energy (CFSE) value. Complexes :…MediumSingle correct
2 Sep 2020, Shift 1 · Q37Consider that a $d^{6}$ metal ion ( $\mathrm{M^{2+}}$ ) forms a complex with aqua ligands, and the spin only magnetic moment of the complex…HardSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.