Inorganic Chemistry PYQ — Page 21

The number of $P-O-P$ bonds in ${H}_{4}{P}_{2}{O}_{7},{({\mathrm{HPO}}_{3})}_{3}$, and ${P}_{4}{O}_{10}$ are respectively

The compound which does not exist is

The correct order of metallic character is

The correct order of electronegativity for given elements is

The complex cation which has two isomers is:

The correct order of bond enthalpy ($\mathrm{kJ}{\mathrm{mol}}^{–1}$) is:

Structures of ${\mathrm{BeCl}}_{2}$ in solid state, vapour phase and at very high temperature respectively are:

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): In expensive scientific instruments, silica gel is kept in watch-glasses or in semipermeable membrane bags. Reason (R): Silica gel adsorbs moisture from air via adsorption, thus protects the instrument from water corrosion (rusting) and / or prevents malfunctioning. In the light of the above statements, choose the correct answer from the options given below:

Which of the following statements are correct? (A) The ${M}^{3+}/{M}^{2+}$ reduction potential for iron is greater than manganese. (B) The higher oxidation states of first row d-block elements get stabilized by oxide ion (C) Aqueous solution of ${\mathrm{Cr}}^{2+}$ can liberate hydrogen from dilute acid (D) Magnetic moment of ${V}^{2+}$ is observed between $4.4-5.2\mathrm{BM}$ Choose the correct answer from the options given below:

For electron gain enthalpies of the elements denoted as ${\Delta }_{\mathrm{eg}}H$, the incorrect option is :

Group-$13$ elements react with ${O}_{2}$ in amorphous form to form oxides of type ${M}_{2}{O}_{3}$ ($M=$ element). Which among the following is the most basic oxide?

Match List I with List II: <table class="pyq-table"><tbody><tr><td colspan="2" rowspan="1">List I (Complexes)</td><td colspan="2" rowspan="1">List II (Hybridisation)</td></tr><tr><td>(A)</td><td>$[\mathrm{Ni}(\mathrm{CO}{)}_{4}]$</td><td>I</td><td>${\mathrm{sp}}^{3}$</td></tr><tr><td>(B)</td><td>${[\mathrm{Cu}{({\mathrm{NH}}_{3})}_{4}]}^{2+}$</td><td>II</td><td>${\mathrm{dsp}}^{2}$</td></tr><tr><td>(C)</td><td>${[\mathrm{Fe}{({\mathrm{NH}}_{3})}_{6}]}^{2+}$</td><td>III</td><td>${\mathrm{sp}}^{3}{d}^{2}$</td></tr><tr><td>(D)</td><td>${[\mathrm{Fe}{({H}_{2}O)}_{6}]}^{2+}$</td><td>IV</td><td>${d}^{2}{\mathrm{sp}}^{3}$</td></tr></tbody></table>

The homoleptic and octahedral complex of ${\mathrm{Co}}^{2+}$ and ${H}_{2}O$ has ______ unpaired electron(s) in the ${t}_{2g}$ set of orbitals.

If ${\mathrm{Ni}}^{2+}$ is replaced by ${\mathrm{Pt}}^{2+}$ in the complex ${[{\mathrm{NiCl}}_{2}{\mathrm{Br}}_{2}]}^{2-}$, which of the following properties are expected to get changed? A. Geometry B. Geometrical isomerism C. Optical isomerism D. Magnetic properties

The maximum number of lone pairs of electron on the central atom from the following species is ...... ${\mathrm{ClO}}_{{3}^{-}},{\mathrm{XeF}}_{4},{\mathrm{SF}}_{4}$ and ${l}_{{3}^{-}}$

The number of species having a square planar shape from the following is ${\mathrm{XeF}}_{4},{\mathrm{SF}}_{4},{\mathrm{SiF}}_{4},{{\mathrm{BF}}_{4}}^{-},{{\mathrm{BrF}}_{4}}^{-},{[\mathrm{Cu}{({\mathrm{NH}}_{3})}_{4}]}^{2+},{[{\mathrm{FeCl}}_{4}]}^{2-},{[{\mathrm{PtCl}}_{4}]}^{2-}$

Given below are two statements, one is labelled as Assertion $A$ and the other is labelled as Reason $R.$ Assertion A: The spin only magnetic moment value for ${[\mathrm{Fe}(\mathrm{CN}{)}_{6}]}^{3-}$ is $1.74\mathrm{BM},$ whereas for [Fe(H2O)6]${[\mathrm{Fe}{({H}_{2}O)}_{6}]}^{3+}$ is $5.92\mathrm{BM}.$ Reason B: In both complexes, $\mathrm{Fe}$ is present in $+3$ oxidation state. In the light of the above statements, choose the correct answer from the options given below:

Total number of acidic oxides among ${N}_{2}{O}_{3},{\mathrm{NO}}_{2},{N}_{2}O,{\mathrm{Cl}}_{2}{O}_{7},{\mathrm{SO}}_{2},\mathrm{CO},\mathrm{CaO},{\mathrm{Na}}_{2}O$ and $\mathrm{NO}$ is _____ .

The correct order of basicity of oxides of vanadium is

Match List-I with List-II: <table class="pyq-table"><tbody><tr><td></td><td>List-I Species</td><td></td><td>List-II Geometry/Shape</td></tr><tr><td>A.</td><td>${H}_{3}{O}^{+}$</td><td>I.</td><td>Tetrahedral</td></tr><tr><td>B.</td><td>Acetylide anion</td><td>II.</td><td>Linear</td></tr><tr><td>C.</td><td>${\mathrm{NH}}_{4}^{+}$</td><td>III.</td><td>Pyramidal</td></tr><tr><td>D.</td><td>${\mathrm{ClO}}_{2}^{-}$</td><td>IV.</td><td>Bent</td></tr></tbody></table>Choose the correct answer from the options given below:

In potassium ferrocyanide, there are ______ pairs of electrons in the ${t}_{2g}$ set of orbitals.

Match List-I with . <table class="pyq-table"><tbody><tr><td colspan="2" rowspan="1">List-I Name of reaction</td><td colspan="2" rowspan="1">List-II Reagent used</td></tr><tr><td>$A$</td><td>Hell-Volhard Zelinsky reaction</td><td>$I$</td><td>$\mathrm{NaOH}+{I}_{2}$</td></tr><tr><td>$B$</td><td>Iodoform reaction</td><td>$\mathrm{II}$</td><td>$(i){\mathrm{CrO}}_{2}{\mathrm{Cl}}_{2},{\mathrm{CS}}_{2} (\mathrm{ii}){H}_{2}O$</td></tr><tr><td>$C$</td><td>Etard reaction</td><td>$\mathrm{III}$</td><td>$(i){\mathrm{Br}}_{2}/\mathrm{red}\mathrm{phosphorus} (\mathrm{ii}){H}_{2}O$</td></tr><tr><td>$D$</td><td>Gatterman-Koch reaction</td><td>$\mathrm{IV}$</td><td>$\mathrm{CO},\mathrm{HCl},\mathrm{anhyd}.{\mathrm{AlCl}}_{3}$</td></tr></tbody></table>Choose the correct answer from the options given below:

Given below are two statements: Statement I: ${\mathrm{SbCl}}_{5}$ is more covalent than ${\mathrm{SbCl}}_{3}$ Statement II: The higher oxides of halogens also tend to be more stable than the lower ones. In the light of the above statements, choose the most appropriate answer from the options given below.

Which of the following complex has a possibility to exist as meridional isomer?