The number of unpaired electrons in $M{n^{ + 3}}$ is
$4$
$3$
$2$
$0$
Which of the following ionic species will impart colour to an aqueous solution
Which one of the following does not correctly represent the order of the property indicated against it ?
The alloy of steel that is used in making automobile parts and utensils
Chloride of which of the following elements will be coloured
For $d-$ block elements the first ionization potential is of the order