List of top Chemistry Questions on coordination compounds asked in WBJEE

For the metal complex \([\text{Co}(\text{NH}_3)_5\text{SO}_4]\text{Br}\), coordination number, oxidation number, number of \(d\)-electrons and number of unpaired \(d\)-electrons are respectively
The correct order of conductivity of 0.001 (M) separate aqueous solutions of \([\text{Pt}(\text{NH}_3)_6]\text{Cl}_4\) (i); \([\text{Cr}(\text{NH}_3)_6]\text{Cl}_3\) (ii); \([\text{Co}(\text{NH}_3)_4\text{Cl}_2]\text{Cl}\) (iii) and \(\text{K}_2\text{PtCl}_6\) (iv) each containing octahedral complex species is
Which of the following species exhibits both LMCT and paramagnetism?

(i)

(ii)

(iii)

 

The relationship between the pair of compounds shown above is respectively,

Which of the following statements is incorrect? 
The correct statement about the magnetic properties of [Fe(CN)6]3- and [FeF6]3- is
Sodium nitroprusside is:
Oxidation states of Cr in K2Cr2O7 and CrO5 are, respectively:
Compounds with spin-only magnetic moment equivalent to five unpaired electrons are
The number of unpaired electrons in $\left[NiCl_{4}\right]^{2-}, Ni\left(CO\right)_{4}$ and $\left[Cu\left(NH_{3}\right)_{4}\right]^{2+}$ respectively are :
The spin-only magnetic moment of $\left[crF_{6}\right]^{4-}$ (atomic number of Cr is 24) is
In the complex ion $\left[Cu\left(CN\right)_{4}\right]^{3-}$ the hybridization state, oxidation state and number of unpaired electrons of copper are respectively
Cold ferrous sulphate solution on absorption of $NO$ develops brown colour due to the formation of
Amongst $\left[NiCl_{4}\right]^{2-}, \left[Ni\left(H_{2}O\right)_{6}\right]^{2+},\left[Ni\left(PPh_{3}\right)_{2}Cl_{2}\right], \left[Ni\left(CO\right)_{4}\right]$ and $\left[Ni\left(CN\right)_{4}\right]^{2-}$. the paramagnetic species are
In $Cu$-ammonia complex, the state of hybridization of $Cu^{+2}$ is
The longest wavelength in Ao in the Balmer series of singly ionised helium ion, He+ is
The solubility product of silver chloride is 1.8 × 10-10 at 298 k. The solubility of AgCl in 0.01 M KCl aqueous solution in mol dm-3 is
A sample containing 1.0 mole of an ideal gas is expanded reversibly and isothermally to ten times its original volume in two separate experiments. The expansion is carried out at 300 K and 600 K, respectively. Choose the correct option.
A compound 'X' on heating gives a colourless gas. The residue is dissolved in water to obtain 'Y'. Excess CO2 is passed through aqueous solution of 'Y', when 'Z' is formed. 'Z', on gentle heating, gives back 'X'. The compound 'X' is
Hybridisation of central atom in NF3 is 
A compound is formed by substitution of two chlorine for two hydrogens in propane. The number of possible isomeric compounds is 
Consider the reaction:VO + Fe2O3 → FeO + V2O5Calculate the weight of FeO produced from 2 g of VO and 5.75 g of Fe2O3.[Take atomic weights of V and Fe to be 51 u and 56 u, respectively.]
A solute ‘S’ undergoes a reversible trimerization when dissolved in a certain solvent. The boiling point elevation of its 0.1 molal solution was found to be identical to the boiling point elevation in case of a 0.08 molal solution of a solute which neither undergoes association nor dissociation. To what percent had the solute ‘S’ undergone trimerization?