In $[Cr(C_2O_4)_3]^{3-}$,the isomerism shown is :-

The one that will show optical activity is: $(en = \text{ethane-}1,2\text{-diamine})$

Paramagnetic coordination compounds contain ........ electrons.

Which of the following will show an increase in weight when kept in a magnetic field?

The correct order of the number of unpaired electrons in the given complexes is
$A$. $[Fe(CN)_6]^{3-}$; $B$. $[FeF_6]^{3-}$; $C$. $[CoF_6]^{3-}$; $D$. $[Cr(oxalate)_3]^{3-}$; $E$. $[Ni(CO)_4]$
Choose the correct answer from the options given below:

What type of color is observed when a compound absorbs $red$ coloured light?