Chemistry · d- and f-Block Elements

In which of the following pairs are both ions coloured in an aqueous solution? [Atomic numbers: Cu = 29, Ti = 22, Co = 27, Fe = 26]

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1Cu+ and Fe2+
2Co2+ and Fe2+✓
3Ti4+ and Co2+
4Cu+ and Ti4+

Correct answer

Co2+ and Fe2+

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In which of the following pairs are both ions coloured in an aqueous solution? [Atomic numbers: Cu = 29, Ti = 22, Co = 27, Fe = 26]

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In which of the following pairs are both ions coloured in an aqueous solution? [Atomic numbers: Cu = 29, Ti = 22, Co = 27, Fe = 26]

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