Which one of the following is paramagnetic
$Zn^{2+}$
$Ni^{2+}$
$Cu^{+}$
none of the above
The spin only magnetic moment value of $Cr(CO)_6$ is
Paramagnetism is not exhibited by
Generally metal ion and their salts are coloured due to presence of unpaired electrons in metal ions. Which of the following compounds are coloured
For the ions $Zn ^{2+}, \,Ni ^{2+}$ and $Cr ^{3+}$ which among the following statements is correct ?
(Atomic number of $Zn =30,\,Ni =28$ and $Cr =24$ )
Besides $Zn$ and $Cu$, german silver contains the metal