MHT-CET · d- and f-Block Elements (Class 12) · Quiz
5 real MHT-CET questions on d- and f-Block Elements (Class 12). Instant scoring and solutions, no signup — see where you stand in ~3 minutes.
Question 1 of 4
HARDChromium metal dissolves in dilute hydrochloric acid to give a blue solution which turns green on standing. The blue colour is due to [Cr(H₂O)₆]²⁺ and the green colour is due to a mixture of complexes. Which of the following best explains the change in colour?