JEE Main Chemistry — Inorganic Chemistry previous year questions with solutions.
In the following sets of reactants which two sets best exhibit the amphoteric character of Al$_{2}$O$_{3}$ . xH$_{2}$O ? $\begin{matrix} \text{Set I} & {\text{Al}}_{2} {\text{O}}_{3} \cdot {\text{xH}}_{2} {\text{O}}_{( \text{s} )} + {\text{OH}}_{( \text{aq} )}^{-} \\ \text{Set II} & {\text{Al}}_{2} {\text{O}}_{3} \text{x} \cdot {\text{H}}_{2} {\text{O}}_{( \text{s} )} + {\text{H}}_{2} {\text{O}}_{( \text{l} )} \\ \text{Set III} & {\text{Al}}_{2} {\text{O}}_{3} \text{x} \cdot {\text{H}}_{2} {\text{O}}_{( \text{s} )} + {\text{H}}_{( \text{aq} )}^{+} \\ \text{Set IV} & {\text{Al}}_{2} {\text{O}}_{3} \cdot {\text{xH}}_{2} {\text{O}}_{( \text{s} )} + {\text{NH}}_{ 3 ( \text{aq} ) } \end{matrix}$
Consider the coordination compound, $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3$. In the formation of this complex, the species which acts as the Lewis acid is:
Which one of the following properties is not shown by NO ?
The octahedral complex of a metal ion ${M}^{3+}$ with four monodentate ligands ${L}_{1},{L}_{2},{L}_{3}\mathrm{and}{L}_{4}$$_{ }$absorb wavelengths in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the four ligands is
The number and type of bonds in ${C}_{2}^{2-}$ ion in ${\mathrm{CaC}}_{2}$ are:
Which of the following molecules has two sigma $(\sigma)$ and two pi $(\pi)$ bonds?
Similarity in chemical properties of the atoms of elements in a group of the Periodic table is most closely related to:
Which of these statements is not true ?
Which one of the following exhibits the large number of oxidation states?
The equation which is balanced and represents the correct product(s) is
Which of the following name formula combinations is not correct?
A compound of vanadium chloride has spin only magnetic moment of $1.73$ BM. Its formula is
In allene $\left(\mathrm{C}_3 \mathrm{H}_4\right)$, the type(s) of hybridization of the carbon atoms is (are) :
Which one of the following complexes will most likely absorb visible light? (At nos. $\mathrm{Sc}=21, \mathrm{Ti}=22, \mathrm{~V}=23, \mathrm{Zn}=30$ )
Which of the following is not formed when H$_{2}$S reacts with acidic K$_{2}$Cr$_{2}$O$_{7}$ solution ?
The correct order of bond dissociation energy among $\mathrm{N}_2, \mathrm{O}_2, \mathrm{O}_2^{-}$is shown in which of the following arrangements?
Example of a three-dimensional silicate is :
The gas evolved on heating ${\mathrm{CaF}}_{2}$ and ${\mathrm{SiO}}_{2}$ with concentrated ${H}_{2}{\mathrm{SO}}_{4}$, on hydrolysis gives a white gelatinous precipitate. The precipitate is:
Shapes of certain interhalogen compounds are stated below. Which one of them is not correctly stated?
Amongst the following, identify the species with an atom in $+6$ oxidation state.
Which one of the following has largest ionic radius ?
Nickel $\text{(Z} \text{=} \text{28)}$ combines with a uninegative monodentate ligand to form a diamagnetic complex ${ [ { \text{NiL}}_{\text{4}} ]}^{ \text{2}-} .$ The hybridisation involved and the number of unpaired electrons present in the complex are respectively:
Which of the following has unpaired electron(s)?
Which of the following arrangements represents the increasing order (smallest to largest) of ionic radii of the given species $\mathrm{O}^{2-}, \mathrm{S}^{2-}, \mathrm{N}^{3-}, \mathrm{P}^{3-}$ ?