Which of the following pair of complexes have the same EAN of the central metal atoms/ions?

Define central metal atom/ion.

Which of the following pair of ions have the same colour ?

Which of the following complex has same oxidation state of the central metall atom in the cationic and anionic part ?

Which of the following complex has same oxidation state of the central metall atom in the cationic and anionic part ?

In which of the following pairs of compounds, the hybrid state of the central atom is same?

Which of the following complex ions has no 'd' electron(s) in the central metal atom -

Which of the following molcules have three lone pairs around central atom -

Which of the following molcules have three lone pairs around central atom -