JEE Main Chemistry — Inorganic Chemistry previous year questions with solutions.
Which one of the following correctly represents the order of stability of oxides, ${X}_{2}O;$ $(X=$ halogen $)?$
Which of the following is used as a catalyst in Contact process?
The number of ionisable hydrogens present in the product obtained from a reaction of phosphorus trichloride and phosphonic acid is:
The number of optical isomers possible for ${[\mathrm{Cr}{({C}_{2}{O}_{4})}_{3}]}^{3-}$ is:
Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$. Assertion $A:$ In $Tl{I}_{3},$ isomorphous to ${\mathrm{CsI}}_{3}$, the metal is present in $+1$ oxidation state. Reason $R:$ $Tl$ metal has fourteen $f$ electrons in its electronic configuration. In the light of the above statements, choose the most appropriate answer from the options given below:
Which pair of oxides is acidic in nature?
$\mathrm{AX}$ is a covalent diatomic molecule where $A$ and $X$ are second row elements of periodic table. Based on Molecular orbital theory, the bond order of $\mathrm{AX}$ is $2.5.$ The total number of electrons in $\mathrm{AX}$ is_____. (Round off to the Nearest Integer).
Consider the sulphides $\mathrm{HgS},\mathrm{PbS},\mathrm{CuS},{\mathrm{Sb}}_{2}{S}_{3},{\mathrm{As}}_{2}{S}_{3}$ and $\mathrm{CdS}.$ Number of these sulphides soluble in $50%{\mathrm{HNO}}_{3}$ is ___________ .
Match List$-I$ with List $-\mathrm{II}$ : <table class="pyq-table"><tbody><tr><td></td><td>List $-I$</td><td></td><td>List$-\mathrm{II}$</td></tr><tr><td>$(a)$</td><td>$\mathrm{NaOH}$</td><td>$(i)$</td><td>Acidic</td></tr><tr><td>$(b)$</td><td>$\mathrm{Be}(\mathrm{OH}{)}_{2}$</td><td>$(\mathrm{ii})$</td><td>Basic</td></tr><tr><td>$(c)$</td><td>$\mathrm{Ca}(\mathrm{OH}{)}_{2}$</td><td>$(\mathrm{iii})$</td><td>Amphoteric</td></tr><tr><td>$(d)$</td><td>$B(\mathrm{OH}{)}_{3}$</td><td></td><td></td></tr><tr><td>$(e)$</td><td>$\mathrm{Al}(\mathrm{OH}{)}_{3}$</td><td></td><td></td></tr></tbody></table>Choose the most appropriate answer from the options given below
The number of species below that have two lone pairs of electrons in their central atom is ___ (Round off to the Nearest integer) ${\mathrm{SF}}_{4},{\mathrm{BF}}_{4}^{-},{\mathrm{ClF}}_{3},{\mathrm{AsF}}_{3},{\mathrm{PCl}}_{5},{\mathrm{BrF}}_{5},{\mathrm{XeF}}_{4},{\mathrm{SF}}_{6}$
$3$ moles of metal complex with formula $\mathrm{Co}(\mathrm{en}{)}_{2}{\mathrm{Cl}}_{3}$ gives $3$ moles of silver chloride on treatment with excess of silver nitrate. The secondary valency of $\mathrm{Co}$ in the complex is (Round off to the nearest integer)
Number of paramagnetic oxides among the following given oxides is $___________.$ ${\mathrm{Li}}_{2}O,\mathrm{CaO},{\mathrm{Na}}_{2}{O}_{2},{\mathrm{KO}}_{2},\mathrm{MgO}$ and ${K}_{2}O$
Statement I : Sodium hydride can be used as an oxidising agent. Statement II : The lone pair of electrons on nitrogen in pyridine makes it basic. Choose the CORRECT answer from the options given below :
${\mathrm{AB}}_{3}$ is an interhalogen T-shaped molecule. The number of lone pairs of electrons on $A$ is (Integer answer)
The spin-only magnetic moment value for the complex ${[\mathrm{Co}(\mathrm{CN}{)}_{6}]}^{4-}$ is...... $\mathrm{BM}$. (nearest integer value) [At. no. of $\mathrm{Co}=27$]
Which of the following is a noble gas?
To an aqueous solution containing ions such as ${\mathrm{Al}}^{3+},{\mathrm{Zn}}^{2+},{\mathrm{Ca}}^{2+},{\mathrm{Fe}}^{3+},{\mathrm{Ni}}^{2+},{\mathrm{Ba}}^{2+}$ and ${\mathrm{Cu}}^{2+}$ was added $\mathrm{conc}.\mathrm{HCl}$, followed by ${H}_{2}S$. The total number of cations precipitated during this reaction is/are :
The ionic radius of ${\mathrm{Na}}^{+}$ ions is $1.02\overset{^{\circ}}{A}.$ The ionic radii (in $\overset{^{\circ}}{A}$) of ${\mathrm{Mg}}^{2+}$ and ${\mathrm{Al}}^{3+},$ respectively, are
Indicate the complex/complex ion which did not show any geometrical isomerism :
A xenon compound $A$ upon partial hydrolysis gives ${\mathrm{XeO}}_{2}{F}_{2}$. The number of lone pair of electrons present in compound $A$ is ___ (Round off to the Nearest integer)
The electrode potential of ${M}^{2+}/M$ of $3$ d-series elements shows positive value for?
Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$. Assertion $A$ : Dipole-dipole interactions are the only non-covalent interactions, resulting in hydrogen bond formation. Reason $R$ : Fluorine is the most electronegative element and hydrogen bonds in $\mathrm{HF}$ are symmetrical. In the light of the above statements, choose the most appropriate answer from the options given below:
The number of $S=O$ bonds present in sulphurous acid, peroxodisulphuric acid and pyrosulphuric acid, respectively are :
The nature of oxides ${V}_{2}{O}_{3}$ and $\mathrm{CrO}$ is indexed as $'X'$ and $'Y'$ type respectively. The correct set of $X$ and $Y$ is: