JEE Main Chemistry — Inorganic Chemistry previous year questions with solutions.
The Lewis acid character of boron tri halides follows the order:
Structures of ${\mathrm{BeCl}}_{2}$ in solid state, vapour phase and at very high temperature respectively are:
The set of correct statements is: (i) Manganese exhibits $+7$ oxidation state in its oxide. (ii) Ruthenium and Osmium exhibit $+8$ oxidation in their oxides. (iii) $\mathrm{Sc}$ shows $+4$ oxidation state which is oxidizing in nature. (iv) $\mathrm{Cr}$ shows oxidising nature in $+6$ oxidation state.
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 :
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>
In which of the following processes, the bond order increases and paramagnetic character changes to diamagnetic one?
The number of following factors which affect the percent covalent character of the ionic bond is______ A) Polarising power of cation B) Extent of distortion of anion C) Polarisability of the anion D) Polarising power of anion
For elements $B,C,N\mathrm{Li},\mathrm{Be},O\mathrm{and}F$, the correct order of first ionisation enthalpy is
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
Order of Covalent bond; A. $\mathrm{KF}>\mathrm{KI};\mathrm{LiF}>\mathrm{KF}$ B. $\mathrm{KF}<\mathrm{KI};\mathrm{LiF}>\mathrm{KF}$ C. ${\mathrm{SnCl}}_{4}>{\mathrm{SnCl}}_{2};\mathrm{CuCl}>\mathrm{NaCl}$ D. $\mathrm{LiF}>\mathrm{KF};\mathrm{CuCl}>\mathrm{NaCl}$ E. $\mathrm{KF}<\mathrm{KI};\mathrm{CuCl}>\mathrm{NaCl}$
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 $P-O-P$ bonds in ${H}_{4}{P}_{2}{O}_{7},{({\mathrm{HPO}}_{3})}_{3}$, and ${P}_{4}{O}_{10}$ are respectively
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.
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?
Compound A reacts with ${\mathrm{NH}}_{4}\mathrm{Cl}$ and forms a compound B. Compound B reacts with ${H}_{2}O$ and excess of ${\mathrm{CO}}_{2}$ to form compound C which on passing through or reaction with saturated NaCl solution forms sodium hydrogen carbonate. Compound A. B and C, are respectively.
Decreasing order of the hydrogen bonding in following forms of water is correctly represented by A. Liquid water B. Ice C. Impure water
The complex that dissolves in water is