Which of the following compounds show colour due to $d-d$ transition?
$\mathrm{CuSO}_4 .5 \mathrm{H}_2 \mathrm{O}$
$\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$
$\mathrm{K}_2 \mathrm{CrO}_4$
$\mathrm{KMnO}_4$
The correct order of decreasing third ionisation enthalpy of $Ti, \,V,\, Cr,\, Mn$ is
Amongest following the lowest degree of paramagnetism per mole of the compound at $298 K$ will be shown by
Which of the following complex ion has a magnetic moment same as $[Cr(H_2O)_6]^{3+}$ ?
Which of the following compounds is not coloured ?
Steel differs from pig iron and wrought iron in that it contains