The green coloured complex ion of nickel in its aqueous solution is

Transition elements in lower oxidation states act as Lewis acid because

Complexes of $CN^-$ ligand are generally...

On adding an excess of $NH_3$ solution to $CuSO_4$ solution,the dark blue colour is due to the formation of which complex?

When $0.1 \ mole$ of $CoCl_3(NH_3)_5$ is treated with excess of $AgNO_3$,$0.2 \ mole$ of $AgCl$ are obtained. The conductivity of the solution will correspond to:

Which of the following molecules is colourless?