Inorganic Chemistry PYQ

Two p-block elements X and Y form fluorides of the type $\mathrm{EF}_{3}$. The fluoride compound $\mathrm{XF}_{3}$ is a Lewis acid and $\mathrm{YF}_{3}$ is a Lewis base. The hybridizations of the central atoms of $\mathrm{XF}_{3}$ and $\mathrm{YF}_{3}$ respectively are

Which of the following elements has the highest electronegativity?

First and second ionization enthalpies of lithium are $520$ kJ mol$^{-1}$ and $7297$ kJ mol$^{-1}$ respectively. Energy required to convert $3.5$ mg lithium (g) into $\text{Li}^{2+}$(g) $[\text{Li(g)} \rightarrow \text{Li}^{2+}\text{(g)}]$ is _______ kJ mol$^{-1}$. (nearest integer) [Molar mass of Li $= 7$ g mol$^{-1}$]

It is noticed that $\mathrm{Pb}^{2+}$ is more stable than $\mathrm{Pb}^{4+}$ but $\mathrm{Sn}^{2+}$ is less stable than $\mathrm{Sn}^{4+}$. Observe the following reactions. $\mathrm{PbO}_{2}+\mathrm{Pb} \rightarrow 2 \mathrm{PbO} ; \Delta_{\mathrm{r}} \mathrm{G}^{\circ}(1)$ $\mathrm{SnO}_{2}+\mathrm{Sn} \rightarrow 2 \mathrm{SnO} ; \Delta_{\mathrm{r}} \mathrm{G}^{\circ}(2)$ Identify the correct set from the following

An excess of AgNO$_3$ is added to $100$ mL of a $0.05$ M solution of tetraaquadichloridochromium (III) chloride. The number of moles of AgCl precipitated will be __________ $\times 10^{-3}$. (Nearest integer)

Identify the molecule $(X)$ with maximum number of lone pairs of electrons (obtained using Lewis dot structure) among $\mathrm{HNO}_{3}, \mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{NF}_{3}$ and $\mathrm{O}_{3}$. Choose the correct bond angle made by the central atom of the molecule $(\mathrm{X})$.

The correct order of $\mathrm{C}, \mathrm{N}, \mathrm{O}$ and F in terms of second ionisation potential is

In period 4 of the periodic table, the elements with highest and lowest atomic radii are respectively.

The number of isoelectronic species among $\mathrm{Sc}^{3+}, \mathrm{Cr}^{2+}, \mathrm{Mn}^{3+}, \mathrm{Co}^{3+}$ and $\mathrm{Fe}^{3+}$ is ' $\mathrm{n}^{\prime}$. If ' $\mathrm{n}^{\prime}$ moles of AgCl is formed during the reaction of complex with formula $\mathrm{CoCl}_{3}(\mathrm{en})_{2} \mathrm{NH}_{3}$ with excess of $\mathrm{AgNO}_{3}$ solution, then the number of electrons present in the $t_{2 g}$ orbital of the complex is $\_\_\_\_$.

Given below are two statements: Statement I: Aluminium is more electropositive than thallium as the standard electrode potential value of $E^{\circ}_{\text{Al}^{3+}/\text{Al}}$ is negative and $E^{\circ}_{\text{Tl}^{3+}/\text{Tl}}$ is positive. Statement II: The sum of first three ionization enthalpies of boron is very high when compared to that of aluminium. Due to this reason boron forms covalent compounds only and aluminium forms $\text{Al}^{3+}$ ion. In the light of the above statements, choose the correct answer from the options given below

Consider the elements $\mathrm{N}, \mathrm{P}, \mathrm{O}, \mathrm{S}, \mathrm{Cl}$ and F. The number of valence electrons present in the elements with most and least metallic character from the above list is respectively.

Given below are two statements: Statement I: The second ionisation enthalpy of Na is larger than the corresponding ionisation enthalpy of Mg. Statement II: The ionic radius of $\mathrm{O}^{2-}$ is larger than that of $\mathrm{F}^{-}$. In the light of the above statements, choose the correct answer from the options given below

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 :

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 ($\xrightarrow{\text{z-axis}}$)?

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 :

The mass of iron converted into $Fe_3O_4$ by the action of $18$ g of steam is : (Given : Molar mass of H, O and Fe are $1$, $16$ and $56$ g mol$^{-1}$ respectively) Assume iron is present in excess :