Inorganic Chemistry PYQ — Page 30

The geometry around boron in the product '$B$' formed from the following reaction is ${\mathrm{BF}}_{3}+\mathrm{NaH}\overset{450K}{\longrightarrow }A+\mathrm{NaF}$ $A+{\mathrm{NMe}}_{3}\rightarrow B$

The spin-only magnetic moment value of ${M}^{3+}$ ion (in gaseous state) from the pairs ${\mathrm{Cr}}^{3+}/{\mathrm{Cr}}^{2+},{\mathrm{Mn}}^{3+}/{\mathrm{Mn}}^{2},{\mathrm{Fe}}^{3+}/{\mathrm{Fe}}^{2+}$ and ${\mathrm{Co}}^{3+}/{\mathrm{Co}}^{2+}$ that has negative standard electrode potential, is_____ $B.M.$

integer

Low oxidation state of metals in their complexes are common when ligands

Given below are two statements : Statement I: ${[\mathrm{Ni}{(\mathrm{CN})}_{4}]}^{2-}$ is square planar and diamagnetic complex, with ${\mathrm{dsp}}^{2}$ hybridization for $\mathrm{Ni}$ but $[\mathrm{Ni}{(\mathrm{CO})}_{4}]$ is tetrahedral, paramagnetic and with ${\mathrm{sp}}^{3}$ hybridication for $\mathrm{Ni}$. Statement II : ${[{\mathrm{NiCl}}_{4}]}^{2-}$ and $[\mathrm{Ni}{(\mathrm{CO})}_{4}]$ both have same d-electron configuration, have same geometry and are paramagnetic. In light the above statements, choose the correct answer form the options given below

If ${[\mathrm{Cu}{({H}_{2}O)}_{4}]}^{2+}$ absorbs a light of wavelength $600\mathrm{nm}$ for $d-d$ transition, then the value of octahedral crystal field splitting energy for ${[\mathrm{Cu}{({H}_{2}O)}_{6}]}^{2+}$ will be____$\times {10}^{-21}J$ [Nearest integer] (Given : $h=6.63\times {10}^{-34}\mathrm{Js}$ and $c=3.08\times {10}^{8}{\mathrm{ms}}^{-1}$)

integer

White precipitate of $\mathrm{AgCl}$ dissolves in aqueous ammonia solution due to formation of

Match List - I with List - II : <table class="pyq-table"><tbody><tr><td></td><td>List-II</td><td></td><td>List-II</td></tr><tr><td>(A)</td><td>${[{\mathrm{PtCl}}_{4}]}^{2-}$</td><td>(I)</td><td>${\mathrm{sp}}^{3}d$</td></tr><tr><td>(B)</td><td>${\mathrm{BrF}}_{5}$</td><td>(II)</td><td>${d}^{2}{\mathrm{sp}}^{3}$</td></tr><tr><td>(C)</td><td>${\mathrm{PCl}}_{5}$</td><td>(III)</td><td>${\mathrm{dsp}}^{2}$</td></tr><tr><td>(D)</td><td>${[\mathrm{Co}{({\mathrm{NH}}_{3})}_{6}]}^{3+}$</td><td>(IV)</td><td>${\mathrm{sp}}^{3}{d}^{2}$</td></tr></tbody></table>Choose the most appropriate answer from the options given below

The oxidation state of Cr in K₂Cr₂O₇ is

Arrange the following in increasing order of their covalent character. (A) ${\mathrm{CaF}}_{2}$ (B) ${\mathrm{CaCl}}_{2}$ (C) ${\mathrm{CaBr}}_{2}$ (D) ${\mathrm{CaI}}_{2}$ Choose the correct answer from the options given below.

Given below are two statements: one is labelled as Assertion and the other is labelled as Reason. Assertion: Flourine forms one oxoacid. Reason: Flourine has smallest size amongst all halogens and is highly electronegative. In the light of the above statements, choose the most appropriate answer from the Question: options given below.

The dark purple colour of ${\mathrm{KMnO}}_{4}$ disappears in the titration with oxalic acid in acidic medium. The overall change in the oxidation number of manganese in the reaction is

Which of the following is a metalloid?

Choose the correct stability order of group $13$ elements in their $+1$ oxidation state.

Given below are two statements: Statement I : Iron (III) catalyst, acidified ${K}_{2}{\mathrm{Cr}}_{2}{O}_{7}$ and neutral ${\mathrm{KMnO}}_{4}$ have the ability to oxidise ${I}^{-}$ to ${I}_{2}$ independently. Statement II: Manganate ion is paramagnetic in nature and involves $p\pi -p\pi$ bonding. In the light of the above statements, choose the correct answer from the options.

Given below are two statements. Statement I : ${O}_{2},{\mathrm{Cu}}^{2+}$ and ${\mathrm{Fe}}^{3+}$ are weakly attracted by magnetic field and are magnetized in the same direction as magnetic field. Statement II : $\mathrm{NaCl}$ and ${H}_{2}O$ are weakly magnetized in opposite direction to magnetic field. In the light of the above statements, choose the most appropriate answer form the options given below

The gas produced by treating an aqueous solution of ammonium chloride with sodium nitrite is

Match List - I with List - II. <table class="pyq-table"><tbody><tr><td></td><td>List-I (Compound)</td><td></td><td>List-II (Shape)</td></tr><tr><td>A</td><td>${\mathrm{BrF}}_{5}$</td><td>I</td><td>bent</td></tr><tr><td>B</td><td>${[{\mathrm{CrF}}_{6}]}^{3-}$</td><td>II</td><td>square pyramidal</td></tr><tr><td>C</td><td>${O}_{3}$</td><td>III</td><td>trigonal bipyramidal</td></tr><tr><td>D</td><td>${\mathrm{PCl}}_{5}$</td><td>IV</td><td>octahedral</td></tr></tbody></table>Choose the correct answer from the options given below

Cerium $(\mathrm{IV})$ has a noble gas configuration. Which of the following is correct statement about it?

The metal ion (in gaseous state) with lowest spin-only magnetic moment value is

During the qualitative analysis of salt with cation ${y}^{2+}$, addition of a reagent $(X)$ to alkaline solution of the salt gives a bright red precipitate. The reagent $(X)$ and the cation $({y}^{2+})$ present respectively are :

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$ Assertion $A$: Boron is unable to form ${\mathrm{BF}}_{6}^{3-}$ Reason $R$: Size of $B$ is very small. In the light of the above statements, choose the correct answer from the options given below

Identify the correct statement for ${B}_{2}{H}_{6}$ from those given below. (A) In ${B}_{2}{H}_{6}$, all $B-H$ bonds are equivalent. (B) In ${B}_{2}{H}_{6}$, there are four $3$-centre- $2$-electron bonds. (C) ${B}_{2}{H}_{6}$ is a Lewis acid. (D) ${B}_{2}{H}_{6}$ can be synthesized from both ${\mathrm{BF}}_{3}$ and ${\mathrm{NaBH}}_{4}$. (E) ${B}_{2}{H}_{6}$ is a planar molecule. Choose the most appropriate answer from the options given below :

The interhalogen compound formed from the reaction of bromine with excess of fluorine is a