JEE Main Chemistry — Inorganic Chemistry previous year questions with solutions.
The number of unpaired d-electrons in \(\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}\) is
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : The total number of geometrical isomers shown by \(\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]^{+}\)complex ion is three. Reason (R): \(\quad\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]^{+}\)complex ion has an octahedral geometry. In the light of the above statements, choose the most appropriate answer from the options given below :
The incorrect statement regarding ethyne is
The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals A. have the same energy B. have the minimum overlap C. have same symmetry about the molecular axis D. have different symmetry about the molecular axis Choose the most appropriate from the options given below:
The orange colour of ${K}_{2}{\mathrm{Cr}}_{2}{O}_{7}$ and purple colour of ${\mathrm{KMnO}}_{4}$ is due to
Choose the correct statements from the following A. ${\mathrm{Mn}}_{2}{O}_{7}$ is an oil at room temperature B. ${V}_{2}{O}_{4}$ reacts with acid to give ${\mathrm{VO}}_{2}^{2+}$ C. $\mathrm{CrO}$ is a basic oxide D. ${V}_{2}{O}_{5}$ does not react with acid Choose the correct answer from the options given below:
Give below are two statements: One is labelled as Assertion \(\mathrm{A}\) and the other is labelled as Reason R: Assertion A: The stability order of +1 oxidation state of Ga, In and T1 is \(\mathrm{Ga} < \mathrm{In} < \) T1. Reason R: The inert pair effect stabilizes the lower oxidation state down the group. In the light of the above statements, choose the correct answer from the options given below:
The correct statements from the following are: A. The strength of anionic ligands can be explained by crystal field theory. B. Valence bond theory does not give a quantitative interpretation of kinetic stability of coordination compounds. C. The hybridization involved in formation of $[\mathrm{Ni}(\mathrm{CN}{)}_{4}]{}^{2–}$ complex is ${\mathrm{dsp}}^{2}$. D. The number of possible isomer(s) of cis-$[{\mathrm{PtCl}}_{2}(\mathrm{en}{)}_{2}]{}^{2+}$ is one Choose the correct answer from the options given below:
Match List I with List II <table class="pyq-table"><tbody><tr><td></td><td>LIST – I (Complex ion)</td><td></td><td>LIST – II (Electronic Configuration</td></tr><tr><td>A.</td><td>${[Cr{({H}_{2}O)}_{6}]}^{3+}$</td><td>I.</td><td>${t}_{2g}^{2}{e}_{g}^{0}$</td></tr><tr><td>B.</td><td>${[Fe{({H}_{2}O)}_{6}]}^{3+}$</td><td>II.</td><td>${t}_{2g}^{3}{e}_{g}^{0}$</td></tr><tr><td>C.</td><td>${[Ni{({H}_{2}O)}_{6}]}^{2+}$</td><td>III.</td><td>${t}_{2g}^{3}{e}_{g}^{2}$</td></tr><tr><td>D.</td><td>${[V{({H}_{2}O)}_{6}]}^{3+}$</td><td>IV.</td><td>${t}_{2g}^{6}{e}_{g}^{2}$</td></tr></tbody></table>Choose the correct answer from the options given below :
Which of the following complex is homoleptic?
A reagent which gives brilliant red precipitate with Nickel ions in basic medium is
The coordination environment of \(\mathrm{Ca}^{2+}\) ion in its complex with \(\mathrm{EDTA}^{4-}\) is :
Given below are two statements: Statement-I: Since fluorine is more electronegative than nitrogen, the net dipole moment of ${\mathrm{NF}}_{3}$ is greater than ${\mathrm{NH}}_{3}$. Statement-II: In ${\mathrm{NH}}_{3}$, the orbital dipole due to lone pair and the dipole moment of $\mathrm{NH}$ bonds are in opposite direction, but in ${\mathrm{NF}}_{3}$ the orbital dipole due to lone pair and dipole moments of N-F bonds are in same direction. In the light of the above statements. Choose the most appropriate from the options given below.
An amine \((\mathrm{X})\) is prepared by ammonolysis of benzyl chloride. On adding p-toluenesulphonyl chloride to it the solution remains clear. Molar mass of the amine (X) formed is ______ \(\mathrm{g} \mathrm{mol}^{-1}\). (Given molar mass in \(\mathrm{gmol}^{-1} \mathrm{C}: 12, \mathrm{H}: 1, \mathrm{O}: 16, \mathrm{~N}: 14\))
Number of Complexes with even number of electrons in \(t_{2 g}\) orbitals is - \(\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+},\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+},\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+},\left[\mathrm{Cu}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+},\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}\)
Number of ambidentate ligands among the following is ______ \(\mathrm{NO}_2^{-}, \mathrm{SCN}^{-}, \mathrm{C}_2 \mathrm{O}_4^{2-}, \mathrm{NH}_3, \mathrm{CN}^{-}, \mathrm{SO}_4^{2-}, \mathrm{H}_2 \mathrm{O}\).
The number of species from the following in which the central atom uses ${\mathrm{sp}}^{3}$ hybrid orbitals in its bonding is _________. ${\mathrm{NH}}_{3},{\mathrm{SO}}_{2},{\mathrm{SiO}}_{2},{\mathrm{BeCl}}_{2},{\mathrm{CO}}_{2},{H}_{2}O,{\mathrm{CH}}_{4},{\mathrm{BF}}_{3}$
The number of white coloured salts among the following is ....... $(A){\mathrm{SrSO}}_{4}(B)\mathrm{Mg}({\mathrm{NH}}_{4}){\mathrm{PO}}_{4}(C){\mathrm{BaCrO}}_{4}$ $(D)\mathrm{Mn}(\mathrm{OH}{)}_{2}(E){\mathrm{PbSO}}_{4}(F){\mathrm{PbCrO}}_{4}$ $(G)\mathrm{AgBr}(H){\mathrm{PbI}}_{2}(I){\mathrm{CaC}}_{2}{O}_{4}$ $(J)[\mathrm{Fe}(\mathrm{OH}{)}_{2}({\mathrm{CH}}_{3}\mathrm{COO})]$
Choose the polar molecule from the following :
Consider the oxides of group $14$ elements $Si{O}_{2},Ge{O}_{2},Sn{O}_{2},Pb{O}_{2},CO$ and $GeO$. The amphoteric oxides are
The electron affinity value are negative for A. \(\mathrm{Be} \rightarrow \mathrm{Be}^{-}\) B. \(\mathrm{N} \rightarrow \mathrm{N}^{-}\) C. \(\mathrm{O} \rightarrow \mathrm{O}^{2-}\) D. \(\mathrm{Na} \rightarrow \mathrm{Na}^{-}\) E. \(\mathrm{Al} \rightarrow \mathrm{Al}^{-}\) Choose the most appropriate answer from the options given below :
The 'Spin only’ Magnetic moment for $[\mathrm{Ni}({\mathrm{NH}}_{3}{)}_{6}]{}^{2+}$ is______$\times {10}^{–1}$ BM. (given = Atomic number of $\mathrm{Ni}:28$) Round off your answer to the nearest integer.
Choose the correct statements from the following A. All group $16$ elements form oxides of general formula $E{O}_{2}$ and $E{O}_{3}$ where $E=S,Se,Te$ and $Po$. Both the types of oxides are acidic in nature. B. $Te{O}_{2}$ is an oxidising agent while $S{O}_{2}$ is reducing in nature. C. The reducing property decreases from ${H}_{2}S$ to ${H}_{2}Te$ down the group. D. The ozone molecule contains five lone pairs of electrons. Choose the correct answer from the options given below:
The total number of molecular orbitals formed from $2s$ and $2p$ atomic orbitals of a diatomic molecule