Select the coloured and paramagnetic ions

Question

Select the coloured and paramagnetic ions (A)  Cu+,Zn2+,Ca2+  (B)  Sc3+,Ti4+,V5+  (C)  Cu2+,Cr+,Mn2+  (D)  Ni2+,Cu+,Hg2+

Tardigrade Admin · Accepted Answer

Ion is coloured if there are electrons in d-suborbit. Paramagnetic nature is also due to unpaired electrons. Thus, every coloured ion is also paramagnetic.

C u^{2 +} = [A r] 3 d^{9},

one unpaired electron in 3d.

C r^{+} = [A r] 3 d^{5};

five unpaired electrons in 3d.

M n^{2 +} = [A r] 3 d^{5}

five unpaired electrons in 3d.

Q. Select the coloured and paramagnetic ions

$C u^{+}, Z n^{2 +}, C a^{2 +}$

$S c^{3 +}, T i^{4 +}, V^{5 +}$

$C u^{2 +}, C r^{+}, M n^{2 +}$

$N i^{2 +}, C u^{+}, H g^{2 +}$

Q. Select the coloured and paramagnetic ions

Cu+,Zn2+,Ca2+

Sc3+,Ti4+,V5+

Cu2+,Cr+,Mn2+

Ni2+,Cu+,Hg2+

Ion is coloured if there are electrons in d-suborbit. Paramagnetic nature is also due to unpaired electrons. Thus, every coloured ion is also paramagnetic. Cu2+=[Ar]3d9, one unpaired electron in 3d. Cr+=[Ar]3d5; five unpaired electrons in 3d. Mn2+=[Ar]3d5 five unpaired electrons in 3d.

$C u^{+}, Z n^{2 +}, C a^{2 +}$

$S c^{3 +}, T i^{4 +}, V^{5 +}$

$C u^{2 +}, C r^{+}, M n^{2 +}$

$N i^{2 +}, C u^{+}, H g^{2 +}$