JEE Main Chemistry — Inorganic Chemistry previous year questions with solutions.
The lanthanoid that does NOT show + 4 oxidation state is:
The set that contains atomic numbers of only transition elements, is :
The electronic configurations of bivalent europium and trivalent cerium are: (atomic number: $Xe=54$ , $Ce=58$ , $Eu=63)$
Consider the complex ions, trans- ${[\mathrm{Co}(\mathrm{en}{)}_{2}{\mathrm{Cl}}_{2}]}^{*}(A)$ and $\mathrm{cis}-{[\mathrm{Co}(\mathrm{en}{)}_{2}{\mathrm{Cl}}_{2}]}^{+}(B).$ The correct statement regarding them is :
The one that can exhibit highest paramagnetic behaviour among the following is : $\mathrm{gly}=$ glycinato; $\mathrm{bpy}=2,2$'$-$bipyridine
The electronic spectrum of ${[\mathrm{Ti}{({H}_{2}O)}_{6}]}^{3+}$ shows a single broad peak with a maximum at $20,300{\mathrm{cm}}^{-1}.$The crystal field stabilization energy (CFSE) of the complex ion, in ${\mathrm{kJmol}}^{-1},$ is : $(1{\mathrm{kJmol}}^{-1}=83.7{\mathrm{cm}}^{-1})$
Consider that ${d}^{6}$ metal ion $({M}^{2+})$ forms a complex with aqua ligands, and the spin only magnetic moment of the complex is $4.90 \mathrm{BM}$. The geometry and the crystal field stabilization energy of the complex is :
Complex $X$ Of composition $Cr{({H}_{2}O)}_{6}C{l}_{n}$ Has a spin only magnetic moment of $3.83B.M.$ It reacts with ${AgNO}_{3}$ And shows geometrical isomerism. The IUPAC nomenclature of $X$ Is:
The major product $[B]$ in the following sequence of reactions is: 
Among the statements $(a)-(d)$ , the incorrect ones are: $(a)$ Octahedral $Co(III)$ complexes with strong field ligands have very high magnetic moments $(b)$ When ${\Delta }_{0}<P$ , the d-electron configuration of $Co(III)$ in an octahedral complex is ${t}_{eg}^{4}{e}_{g}^{2}$ $(c)$ Wavelength of light absorbed by ${[Co{(en)}_{3}]}^{3+}$ is lower than that of ${[{CoF}_{6}]}^{3-}$ $(d)$ If the ${\Delta }_{0}$ for an octahedral complex of $Co(III)$ is $18,000c{m}^{-1}$, the ${\Delta }_{t}$ for its tetrahedral complex with the same ligand will be $16,000c{m}^{-1}$.
Consider the following molecules and statements related to them:  (a) (B) is more likely to be crystaline than (A) (b) (B) has higher boiling point than (A) (c) (B) dissolves more readily than (A) in water Identify the correct option from below:
The number of possible optical isomers for the complexes ${MA}_{2}{B}_{2}$ with $s{p}^{3}$ and $ds{p}^{2}$ hybridized metal atom, respectively, is: Note: $A$ and $B$ are unidentate neutral and unidentate monoanionic ligands, respectively.
The presence of soluble fluoride ion upto 1 ppm concentration in drinking water, is :
The incorrect statement is:
The atomic number of the element unnilennium is :
The pair in which both the species have the same magnetic moment (spin only) is:
The theory that can completely/properly explain the nature of bonding in $[\mathrm{Ni}{(\mathrm{CO})}_{4}]$ is:
Complex A has a composition of ${H}_{12}{O}_{6}{\mathrm{Cl}}_{3}Cr$. If the complex on treatment with conc. ${H}_{2}{\mathrm{SO}}_{4}$ loses $13.5%$ of its original mass, the correct molecular formulas of $A$ is: [Given : atomic mass of $Cr=52$ amu and $CI=35$amu]
The correct statement with respect to dinitrogen is:
The third ionization enthalpy is minimum for:
The molecular geometry of ${\mathrm{SF}}_{6}$ is octahedral. What is the geometry of ${\mathrm{SF}}_{4}$ (including lone pair(s) of electrons, if (any)?
White phosphorus on reaction with concentrated $NaOH$ solution in an inert atmosphere of $C{O}_{2}$ gives phosphine and compound $(X).(X)$ on acidification with $HCl$ gives compound $(Y).$ The basicity of compound $(Y)$ is:
Reaction of an inorganic sulphite $X$ with dilute ${H}_{2}{\mathrm{SO}}_{4}$ generated compound $Y$. Reaction of $Y$ with $\mathrm{NaOH}$ gives $X$. Further, the reaction of $X$ with $Y$ and water affords compound $Z,Y$ and $X$, respectively, are :
In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is :