JEE Main 2023 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 6 April 2023, Shift 2, Chemistry Q72

Question 72 of 90 in this shift, Chemistry question 12 of 30, Section A.

The IUPAC name of

\mathrm{K_3[Co(C_2O_4)_3]}

is:-

(1)Potassium tris(oxalato)cobalt(III)
(2)Potassium tris(oxalato)cobaltate(III)
(3)Potassium trioxalatocobalt(III)
(4)Potassium trioxalatocobaltate(III)Official answer

Official answer

Option 4

NTA final key.

Chapter: Coordination Compounds
Topic: Coordination Nomenclature
Idea tested: Anionic Complex Suffixes

Same topic in other shifts

All Coordination Nomenclature questions

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8 Apr 2024, Shift 1 · Q70An octahedral complex with the formula $\mathrm{CoCl_3\cdot nNH_3}$ upon reaction with excess of $\mathrm{AgNO_3}$ solution gives 2 moles…MediumSingle correct
29 Jul 2022, Shift 2 · Q86Sum of oxidation state (magnitude) and coordination number of cobalt in $\mathrm{Na[Co(bpy)Cl_4]}$ is ____. (Given: bpy = [figure:…EasyNumerical valueHas a figure
30 Jul 2022, Shift 2 · Q50In the ring test of $\mathrm{NO_3^-}$ ion what is the oxidation number of iron in the complex (brown ring)…MediumSingle correct
3 Aug 2021, Shift 2 · Q40The oxidation states of Fe in $\mathrm{[Fe(NCS)(NH_3)_5]SO_4}$ , $\mathrm{Na_3[Fe(S_2O_3)_3]}$ and $\mathrm{[Fe(CO)_5]}$ respectively areEasySingle correct
4 Aug 2021, Shift 1 · Q57Among the following species, the number of species with oxidation state of Fe in +3 is ________. A.…MediumNumerical valueHas a figure

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.