Chemistry · 2015
JEE Main · 11 April 2015, Shift 1 · Q48
When concentrated HCl is added to an aqueous solution of CoCl_2, its colour changes from reddish pink to deep blue. Which complex ion gives blue…
When concentrated HCl is added to an aqueous solution of $\displaystyle \mathrm{CoCl}_2$, its colour changes from reddish pink to deep blue. Which complex ion gives blue colour in this reaction ?
Official answer
(3)
$\displaystyle \left[\mathrm{CoCl}_4\right]^{2-}$
More from Coordination Compounds
- Which of the following complex is octahedral, diamagnetic and the most stable?2023
- The following ligand is:2019
- Which one of the following complexes will consume more equivalents of aqueous solution of Ag(NO_3)?2016
- The conditions and consequence that favours the t_2 g^3 e_g^1 configuration in a metal complex are:2025
- If Ni^2+ is replaced by Pt^2+ in the complex [NiCl_2 Br_2]^2-, which of the following properties are expected to get changed? A. Geometry B.…2023
- To inhibit the growth of tumours, identify the compounds used from the following: A. EDTA B. Coordination Compounds of Pt C. D - Penicillamine D. Cis…2023
- Complex X of composition Cr(H_2 O)_6 Cl_n has a spin only magnetic moment of 3.83 BM. It reacts with AgNO_3 and shows geometrical isomerism. The…2020
- The number of stereoisomers possible for [Co(ox)_2(Br)(NH_3)]^2- is \ \ \ \. [ox = oxalate]2021
JEE Main 2015 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.