Chemical Bonding
Barium ions, $$CN^-$$ and $$Co^{2+}$$ form an ionic complex. If this complex is 75% ionised in aqueous solution with Van't Hoff factor (i) equal to four and paramagnetic moment is found to be 1.73 BM (due to spin only) then the hybridisation state to Co (II) in the complex will be :
Chemical Bonding
Select correct statement(s) regarding given complexes :
Chemical Bonding
In $${ \left[ Fe{ CN }_{ 5 }(NO) \right] }^{ 2- }$$, $$Fe$$ has $$+2$$ state. It cannot be decided by
Chemical Bonding
The type of hybridization involved in octahedral complex is :
Chemical Bonding
An octahedral complex of $$Co^{3+}$$ is diamagnetic. The hybridisation involved in the formation of the complex is:
Chemical Bonding
In a fuel cell, methanol is used as fuel and oxygen gas is used as an oxidizer.
The reaction is: $$\mathrm {C}\mathrm{H}_{3}\mathrm{O}\mathrm{H}(l)+\dfrac{3}{2}\mathrm{O}_{2}(\mathrm{g})\rightarrow \mathrm{C}\mathrm{O}_{2}(\mathrm{g})+2\mathrm{H}_{2}\mathrm{O}(l)$$
At $$298\ \mathrm{K}$$, standard Gibb's energies of formation for $$\mathrm{C}\mathrm{H}_{3}\mathrm{O}\mathrm{H}(l),\ \mathrm{H}_{2}\mathrm{O}(l)$$ and $$\mathrm{C}\mathrm{O}_{2}(\mathrm{g})$$ are$$-166.2, - 237.2$$ and $$-394.4\ \mathrm{k}\mathrm{J}\mathrm{m}\mathrm{o}1^{-1}$$ respectively.
If standard enthalpy of combustion of methanol is $$-726\ \mathrm{k}\mathrm{J}\mathrm{m}\mathrm{o}1^{-1}$$, efficiency of the fuel cell will be:
Chemical Bonding
The pair of metal ions that can give a spin only magnetic moment of $$3.9\ BM$$ for the complex $$[M(H_{2}O)_{6}]Cl_{2}$$, is:
Chemical Bonding
Nickel $$(Z=28)$$ combines with a uninegative monodentate ligand to form a diamagnetic complex $$[NiX_4]^{2-}$$. The hybridization involved and the number of unpaired electrons present in the complex is respectively:
Chemical Bonding
Which of the following is paramagnetic?
Chemical Bonding
The hybridization involved in complex $$[Ni(CN)_4]^{2-}$$ is:
[Atomic number of Ni $$=28]$$