MCQ
Which of the following complex has zero magnetic moment (spin only)?
- A$[Ni(NH_3)_6]Cl_2$
- B$Na_3[FeF_6 ]$
- C$[Cr(H_2O)_6]SO_4$
- ✓$K_4[Fe(CN)_6 ]$
✓
Answer
Correct option: D.
$K_4[Fe(CN)_6 ]$
d
$[Ni{(N{H_3})_6}]C{l_2}$ $\to $ $s{p^3}{d^2}$ hybridisation $\to $ $2$ unpaired electrons
$[Ni{(N{H_3})_6}]C{l_2}$ $\to $ $s{p^3}{d^2}$ hybridisation $\to $ $2$ unpaired electrons
$N{a_3}[Fe{F_6}]$ $\to $ $s{p^3}{d^2}$ hybridisation $\to $ $3$ unpaired electrons
$[Cr{({H_2}O)_6}]S{O_4}$ $\to $ ${d^2}s{p^3}$ hybridisation $\to $ $3$ unpaired electrons
${K_4}[Fe{(CN)_6}]$ $\to $ ${d^2}s{p^3}$ hybridisation $\to $ No unpaired electrons
Zero magnetic moment means all the electrons paired.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which of the following compound gives oxygen on fast heating
→$(I)$ $AgNO_3$ $(II)$ $CaCO_3$
$(III)$ $Pb(NO_3)_2$ $(IV)$ $Na_2CO_3$
The structural formula of an amino acid, isoleucine is :-
For the reaction 3A → 2B, rate of reaction $-\frac{ d [ A ]}{ dt }$ is equal to
→Lead pipes are readily corroded by:
If a and $t \frac{1}{2}$ is the initial concentration of the reactants and the half-life of the zero order reaction respectively, then which of the following is the correct relationship?
→The molarity of $20\% \,(W/W)$ solution of sulphuric acid is $2.55\, M$. The density of the solution is ........... $g \,cm^{-3}$.
→is
Most reactive compound towards grignard's reagent
Which of the following molecules would diffuse through a cell membrane
Which has valency two