Which of the following compounds is not coloured ?
$Na_2[CuCl_4]$
$Na_2[CdCl_4]$
$Fe_4[Fe(CN)_6]_3$
none of these
The Azimuthal quantum number for the valence electrons of $\mathrm{Ga}^{+}$ion is $.....$
(Atomic number of $\mathrm{Ga}=31$ )
Manganese steel is used for making railway tracks because
Which one of the following has the maximum number of unpaired electrons
The anode mud in the electrolytic refining of silver contains
Which one of the following species is stable in aqueous solution ?