Which of the following hydrated complex ion has high intensity colour in aqueous solution.

CHEMISTRY · Single correct · A Level · Chemistry · Transition metals and their chemistry · Transition metals and their chemistry

Problem

Which of the following hydrated complex ion has high intensity colour in aqueous solution. (1)

[\text{Mn}(\text{H}_2\text{O})_6]^{3+}

(2)

[\text{Co}(\text{H}_2\text{O})_6]^{2+}

(3)

[\text{Ni}(\text{H}_2\text{O})_6]^{2+}

(4)

[\text{Mn}(\text{H}_2\text{O})_6]^{2+}