Identify incorrect statement
$Cu_2O$ is colourless
Copper $(I)$ compounds are colourless except when colour results from charge transfer
Copper $(I)$ compounds are diamagnetic.
$Cu_2S$ is black.
Permanent magnet is made from
Correct statement for $3d-$ series is
The number of hydrogen bonded water molecule(s) associated with $CuSO_4\cdot 5H_2O$ is
Write a note on halide compounds of transition elements.
$Zn$ and $Hg$ belong to the same group, they differ in many of their properties. The property that is shared by both is