MCQ
Which of the following is paramagnetic?
- A$[Fe(CN)_6]^{4-}$
- B$[Ni(CO)_4]$
- C$[Ni(CO)_4]^{2-}$
- ✓$[CoF_6]^{3-}$
✓
Answer
Correct option: D.
$[CoF_6]^{3-}$
d
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
The enthalpy change for the conversion of $\frac{1}{2} Cl _2$ (g) to $Cl ^{-}$(aq) is $(-).......$
→$kJ\,mol ^{-1}$ (Nearest integer)
Given : $\Delta_{ dis } H _{ Cl _{2(g)}}^{\circ}=240\,kJ\,mol ^{-1}$.
$\Delta_{ eg } H _{ Cl _{(g)}}^{\circ}=-350\,kJ\,mol ^{-1}$,
$\Delta_{ hyd } H _{ Cl i _{( j )}^{\circ}}^{\circ}=-380\,kJ\,mol ^{-1}$
$(A)$ $HOCl + H _{2} O _{2} \rightarrow H _{3} O ^{+}+ Cl ^{-}+ O _{2}$
→$(B)$ $I _{2}+ H _{2} O _{2}+2 OH ^{-} \rightarrow 2 I ^{-}+2 H _{2} O + O _{2}$
Choose the correct option.
The correct order as indicate in each option is
On heating a mixture of $SO_2Cl_2$ and $CO$ two equilibria are simultaneously established
→$S{O_2}C{l_2}(g) \rightleftharpoons S{O_2}(g) + C{l_2}(g)$
$CO(g) + C{l_2}(g) \rightleftharpoons COC{l_2}(g)$
on adding more $SO_2$ at equilibrium what will happen?
In the following molecules,
→$[Image]$
Hybridisation of carbon $a, b$ and $c$ respectively are :
In Lithum, $2s$ electron experience the force of attraction exerted by nucleus is
→Acetic acid is manufactured by the fermentation of
Which of the following will be obtained by keeping ether in contact with air for a long time
The order of decreasing reactivity towards an electrophilic reagent, for the following Would be
→$(a)$ Benzene
$(b)$ Toluene
$(c)$ Chlorobenzene and
$(d)$ Phenol
If the ionization energy of $He^+$ is $8.68 \times 10^{-18}\, J$ , then the energy of $Be^{+3}$ ion in the second orbit is:- ( $Z$ of $Be = 4$)
→