EASY
MHT-CET
IMPORTANT
Earn 100

Which of the following does NOT show different oxidation states?

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Important Questions on d- and f-Block Elements

MEDIUM
MHT-CET
IMPORTANT

In which of the following pairs both the ions are coloured in aqueous solution?

(Atomic number: Sc=21, Ti=22, Ni=28, Cu=29, Co=27)