EAMCET Engineering 2009 Solved Paper

Paramagnetic property depends upon the number of unpaired electrons. Higher the number of unpaired electrons, higher the paramagnetic property will be.
Cu2+=[Ar]3d9, no. of unpaired electrons =1
V2+=[Ar]3d3, no. of unpaired electrons =3
Cr2+=[Ar]3d4, no. of unpaired electrons =4
Mn2+=[Ar]3d5, no. of unpaired electrons =5
Hence, correct order is
Cu2+<V2+<Cr2+<Mn2+