Chemistry - Complete d-block Question with Solution | TestHub

Question Explanation:

Identify the set of species with same magnetic nature and magnetic moment. Concept:

Magnetic moment depends on unpaired electrons.

Solution:

We count unpaired electrons (n) for each option.

- Option 1: ${\mathrm{Fe}}^{+3}\left(n=5\right),{\mathrm{Cu}}^{+}\left(n=0\right),{\mathrm{Ag}}^{+}\left(n=0\right)$. Different n.

- Option 2: ${\mathrm{Co}}^{+3}\left(n=4\right),{\mathrm{Cr}}^{+3}\left(n=3\right),{\mathrm{Ni}}^{+2}\left(n=2\right)$. Different n.

- Option 3: ${\mathrm{Cu}}^{+}\left(n=0\right),{\mathrm{Zn}}^{+2}\left(n=0\right),{\mathrm{Cd}}^{+2}\left(n=0\right)$. n = 0 , diamagnetic.

- Option 4: ${\mathrm{Mn}}^{+2}\left(n=5\right),{\mathrm{Fe}}^{+2}\left(n=4\right),{\mathrm{As}}^{+3}\left(n=0\right)$. Different n.

Option 3 is the only set with the same magnetic nature (diamagnetic) and same magnetic moment (zero).

Final Answer:  option (c)