Which of the following has the maximum molar conductivity?

Which of the following compounds after mixing cannot produce blue coloration?

$CrCl_3 \cdot xNH_3$ can exist as a complex. $A$ $0.1 \ m$ aqueous solution of this complex shows a depression in freezing point of $0.558^{\circ} C$. Assuming $100 \%$ ionisation of this complex and that the coordination number of $Cr$ is $6$,the complex will be: (Given $K_f = 1.86 \ K \ kg \ mol^{-1}$)

Select the option containing the correct order of the given parameter.

Which of the following is the most stable complex ion?

The $CN^-$ ion exhibits which of the following properties towards metal components: $(a)$ Reducing agent,$(b)$ Oxidizing agent,$(c)$ Complexing agent?