JEE Main Chemistry — Inorganic Chemistry previous year questions with solutions.
Given below are two statements : Statement I: $\quad \mathrm{C}<\mathrm{O}<\mathrm{N}<\mathrm{F}$ is the correct order in terms of first ionization enthalpy values. Statement II: $\quad \mathrm{S}>\mathrm{Se}>\mathrm{Te}>\mathrm{Po}>\mathrm{O}$ is the correct order in terms of the magnitude of electron gain enthalpy values. In the light of the above statements, choose the correct answer from the options given below :
Given below are two statements : Statement I : The correct order in terms of atomic/ionic radii is $\mathrm{Al}>\mathrm{Mg}>\mathrm{Mg}^{2+}>\mathrm{Al}^{3+}$. Statement II : The correct order in terms of the magnitude of electron gain enthalpy is $\mathrm{Cl}>\mathrm{Br}>\mathrm{S}>\mathrm{O}$. In the light of the above statements, choose the correct answer from the options given below :
Among $\mathrm{H}_{2} \mathrm{~S}, \mathrm{H}_{2} \mathrm{O}, \mathrm{NF}_{3}, \mathrm{NH}_{3}$ and $\mathrm{CHCl}_{3}$, identify the molecule $(\mathrm{X})$ with lowest dipole moment value. The number of lone pairs of electrons present on the central atom of the molecule $(X)$ is :
Which of the following pictorial diagram most correctly represents the $\pi^*$ ($\pi$-antibonding) molecular orbital between two atoms if the internuclear axis is taken to be in the z-direction ($\xrightarrow{\text{z-axis}}$)?
Among the following, the CORRECT combinations are A. $\mathrm{IF}_{3} \rightarrow \mathrm{~T}$-shaped (sp$\left.{ }^{3} \mathrm{~d}\right)$ B. $\mathrm{IF}_{5} \rightarrow$ Square pyramidal $\left(\mathrm{sp}^{3} \mathrm{~d}^{2}\right)$ C. $\mathrm{IF}_{7} \rightarrow$ Pentagonal bipyramidal $\left(\mathrm{sp}^{3} \mathrm{~d}^{3}\right)$ D. $\mathrm{ClO}_{4}{ }^{-} \rightarrow$ Square planar $\left(\mathrm{sp}^{2} \mathrm{~d}\right)$ Choose the correct answer from the options given below:
Which statements are NOT TRUE about $\mathrm{XeO}_{2} \mathrm{~F}_{2}$ ? A. It has a see-saw shape. B. Xe has 5 electron pairs in its valence shell in $\mathrm{XeO}_{2} \mathrm{~F}_{2}$. C. The $\mathrm{O}-\mathrm{Xe}-\mathrm{O}$ bond angle is close to $180^{\circ}$. D. The $\mathrm{F}-\mathrm{Xe}-\mathrm{F}$ bond angle is close to $180^{\circ}$. E. Xe has 16 valence electrons in $\mathrm{XeO}_{2} \mathrm{~F}_{2}$. Choose the correct answer from the options given below:
Given below are two statements: Statement I : The correct order in terms of bond dissociation enthalpy is $\mathrm{Cl}_{2}>\mathrm{Br}_{2}>\mathrm{F}_{2}>\mathrm{I}_{2}$. Statement II: The correct trend in the covalent character of the metal halides is $\left[\mathrm{SnCl}_{4}>\mathrm{SnCl}_{2}\right]$, $\left[\mathrm{PbCl}_{4}>\mathrm{PbCl}_{2}\right]$ and $\left[\mathrm{UF}_{4}>\mathrm{UF}_{6}\right]$. In the light of the above statements, choose the correct answer from the options given below :
Given below are two statements: Statement I: The correct order of electronegativity of fluorine, oxygen and nitrogen is $F > O > N$. Statement II: The oxidation state of oxygen in OF$_2$ is $+2$ and in Na$_2$O is $-2$. In the light of the above statements, choose the correct answer from the options given below
Choose the INCORRECT statement
Match the LIST-I with LIST-II <table class="pyq-table"><tbody><tr><th>List-I Complex ion</th><th>List-II Calculated spin only magnetic moment (BM)</th></tr><tr><td>A. $[Cr(H_2O)_6]^{2+}$</td><td>I. $3.87$</td></tr><tr><td>B. $[Co(H_2O)_6]^{2+}$</td><td>II. $5.92$</td></tr><tr><td>C. $[Cu(H_2O)_6]^{2+}$</td><td>III. $4.90$</td></tr><tr><td>D. $[Mn(H_2O)_6]^{2+}$</td><td>IV. $1.73$</td></tr></tbody></table> Choose the correct answer from the options given below:
Consider the following statements about manganate and permanganate ions. Identify the correct statements. A. The geometry of both manganate and permanganate ions is tetrahedral. B. The oxidation states of Mn in manganate and permanganate are +7 and +6, respectively. C. Oxidation of Mn (II) salt by peroxodisulphate gives manganate ion as the final product. D. Manganate ion is paramagnetic and permanganate ions is diamagnetic. E. Acidified permanganate ion reduces oxalate, nitrite and iodide ions. Choose the correct answer from the options given below :
Match List - I with List - II according to shape. \(\begin{array}{llll} & \text{List-I} & & \text{List-II} \\ A. & \mathrm{XeO_3} & I. & \mathrm{BrF_5} \\ B. & \mathrm{XeF_2} & II. & \mathrm{NH_3} \\ C. & \mathrm{XeO_2F_2} & III. & [\mathrm{I_3}]^- \\ D. & \mathrm{XeOF_4} & IV. & \mathrm{SF_4} \end{array}\) Choose the correct answer from the options given below :
Given below are two statements : Statement (I) : Oxidising power of halogens decreases in the order $F_2 > Cl_2 > Br_2 > I_2$, which is the basis of "Layer test". Statement (II) : "Layer test" to identify $Br_2$ and $I_2$ in aqueous solution involves the oxidation of bromide or iodide into $Br_2$ or $I_2$ respectively with $Cl_2$, which is a type of displacement redox reaction. In the light of the above statements, choose the correct answer from the options given below :
A student has been given 0.314 g of an organic compound and asked to estimate Sulphur. During the experiment, the student has obtained 0.4813 g of barium sulphate. The percentage of sulphur present in the compound is $\_\_\_\_$. (Given Molar mass in $\mathrm{g} \mathrm{mol}^{-1} \mathrm{~S}: 32, \mathrm{BaSO}_{4}: 233$)
Given below are statements about some molecules/ions. Identify the CORRECT statements. A. The dipole moment value of $\mathrm{NF}_{3}$ is higher than that of $\mathrm{NH}_{3}$. B. The dipole moment value of $\mathrm{BeH}_{2}$ is zero. C. The bond order of $\mathrm{O}_{2}{ }^{2-}$ and $\mathrm{F}_{2}$ is same. D. The formal charge on the central oxygen atom of ozone is -1. E. In $\mathrm{NO}_{2}$, all the three atoms satisfy the octet rule, hence it is very stable. Choose the correct answer from the options given below:
Consider a mixture ' X ' which is made by dissolving 0.4 mol of $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{SO}_{4}\right] \mathrm{Br}$ and 0.4 mol of $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{Br}\right] \mathrm{SO}_{4}$ in water to make 4 L of solution. When 2 L of mixture ' X ' is allowed to react with excess of $\mathrm{AgNO}_{3}$, it forms precipitate ' Y '. The rest 2 L of mixture ' X ' reacts with excess $\mathrm{BaCl}_{2}$ to form precipitate ' Z '. Which of the following statements is CORRECT?
Identify the CORRECT set of details from the following: A. $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$ : Inner orbital complex; $\mathrm{d}^{2} \mathrm{sp}^{3}$ hybridized B. $\left[\mathrm{MnCl}_{6}\right]^{3-}$ : Outer orbital complex; $\mathrm{sp}^{3} \mathrm{~d}^{2}$ hybridized C. $\left[\mathrm{CoF}_{6}\right]^{3-}$ : Outer orbital complex; $\mathrm{d}^{2} \mathrm{sp}^{3}$ hybridized D. $\left[\mathrm{FeF}_{6}\right]^{3-}$ : Outer orbital complex; $\mathrm{sp}^{3} \mathrm{~d}^{2}$ hybridized E. $\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}$ : Inner orbital complex; $\mathrm{sp}^{3}$ hybridized Choose the correct answer from the options given below:
Given below are two statements for catalytic properties of transition metals. Statement I: First row transition metals which act as catalyst utilise their 3d electrons only for formation of bonds between reactant molecules and atoms on the surface of catalyst. Statement II: There is increase in the concentration of reactants on the surface of catalyst which strengthens the bonds in reacting molecules. In the light of the above statements, choose the correct answer from the options given below:
Consider the following reactions. $\mathrm{PbCl}_{2}+\mathrm{K}_{2} \mathrm{CrO}_{4} \rightarrow \mathrm{~A}+2 \mathrm{KCl}$ (Hot solution) $\mathrm{A}+\mathrm{NaOH} \rightleftharpoons \mathrm{B}+\mathrm{Na}_{2} \mathrm{CrO}_{4}$ $\mathrm{PbSO}_{4}+4 \mathrm{CH}_{3} \mathrm{COONH}_{4} \rightarrow\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4}+\mathrm{X}$ In the above reactions, $\mathrm{A}, \mathrm{B}$ and X are respectively.
Find the correct statements related to group 15 hydrides. A. Reducing nature increases from NH$_3$ to BiH$_3$ B. Tendency to donate lone pair of electrons decreases from NH$_3$ to BiH$_3$ C. The stability of hydrides decreases from NH$_3$ to BiH$_3$ D. HEH bond angle decreases from NH$_3$ to SbH$_3$ (E = Elements of group 15) Choose the correct answer from the options given below:
The correct statements among the following are. A. Basic vanadium oxide is used in the manufacture of $\text{H}_2\text{SO}_4$. B. The spin-only magnetic moment value of the transition metal halide employed in Ziegler-Natta polymerization is $2.84$ BM. C. The p-block metal compound employed in Ziegler-Natta polymerization has the metal in $+3$ oxidation state. D. The number of electrons present in the outer most 'd' orbital of metal halide employed in Wacker process is $8$. Choose the correct answer from the options given below:
Given below are two statements: Statement I: Among $Zn, Mn, Sc$ and $Cu$, the energy required to remove the third valence electron is highest for $Zn$ and lowest for $Sc$. Statement II: The correct order of the following complexes in terms of CFSE is $[Co(H_2 O)_6]^{2+} < [Co(H_2 O)_6]^{3+} < [Co(en)_3]^{3+}$. In the light of the above statements, choose the correct answer from the options given below:
Given below are two statements: Statement I: The number of pairs among $[\text{Ti}^{4+}, \text{V}^{2+}]$, $[\text{V}^{2+}, \text{Mn}^{2+}]$, $[\text{Mn}^{2+}, \text{Fe}^{3+}]$ and $[\text{V}^{2+}, \text{Cr}^{2+}]$ in which both ions are coloured is $3$. Statement II: The number of pairs among $[\text{La}^{3+}, \text{Yb}^{2+}]$, $[\text{Lu}^{3+}, \text{Ce}^{4+}]$ and $[\text{Ac}^{3+}, \text{Lr}^{3+}]$ ions in which both are diamagnetic is $3$. In the light of the above statements, choose the correct from the options given below:
Among $Fe^{3+}$, $Pb^{2+}$, $Cu^{2+}$ and $Mn^{2+}$, identify the one that gets precipitated out while passing $H_2S$ in presence of $NH_4OH$ as group reagent. The highest possible oxidation state of the corresponding metal is