Engineering
Chemistry
Important Term for Coordination Compounds
Oxidation number in complex
Question

The oxidation states of Cr in [Cr(H2O)6]Cl3, [Cr(C6H6)2], and K2[Cr(CN)2(O)2(O2)(NH3)] respectively are :

+3, 0 and +6

+3, +2 and +4

+3, +4 and +6

+3, 0 and +4

JEE Advance
College PredictorLive

Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.

Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA

Solution

[Cr(H2O)6]Cl3 → Cr+3

[Cr(C6H6)2]  → Cr0

K2[Cr(CN)2(O–2)2(O2)–2(NH3)] → Cr+6