Inorganic Chemistry PYQ — Page 11

Total number of molecules/species from following which will be paramagnetic is ______ $\mathrm{O}_2, \mathrm{O}_2^{+}, \mathrm{O}_2^{-}, \mathrm{NO}, \mathrm{NO}_2, \mathrm{CO}, \mathrm{K}_2\left[\mathrm{NiCl}_4\right],\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3, \mathrm{~K}_2\left[\mathrm{Ni}(\mathrm{CN})_4\right]$

Preparation of potassium permanganate from $\mathrm{MnO}_2$ involves two step process in which the 1st step is a reaction with KOH and $\mathrm{KNO}_3$ to produce

In 3, 3-dimethylhex-1-ene-4-yne, there are _______ $\mathrm{sp}^3$, _______ $\mathrm{sp}^2$ and _______ sp hybridised carbon atoms respectively :

The incorrect relationship in the following pairs in relation to ionisation enthalpies is :

The correct order of the following complexes in terms of their crystal field stabilization energies is :

The maximum covalency of a non-metallic group 15 element ' E ' with weakest $\mathrm{E}-\mathrm{E}$ bond is :

Identify the diamagnetic octahedral complex ions from below ; A. $\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-}$ B. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ C. $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-}$ D. $\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_3 \mathrm{~F}_3\right]$ Choose the correct answer from the options given below :

Which among the following molecules is (a) involved in $\mathrm{sp}^3 \mathrm{~d}$ hybridization, (b) has different bond lengths and (c) has lone pair of electrons on the central atom?

The type of oxide formed by the element among $\mathrm{Li}, \mathrm{Na}, \mathrm{Be}, \mathrm{Mg}, \mathrm{B}$ and Al that has the least atomic radius is :

The element that does not belong to the same period of the remaining elements (modern periodic table) is:

The number of optical isomers exhibited by the iron complex (A) obtained from the following reaction is ________ $\mathrm{FeCl}_3+\mathrm{KOH}+\mathrm{H}_2 \mathrm{C}_2 \mathrm{O}_4 \rightarrow \mathrm{~A}$

The conditions and consequence that favours the $t_{2 g}^3 e_g^1$ configuration in a metal complex are

Identify $\mathrm{A}, \mathrm{B}$ and C in the given below reaction sequence $\mathrm{A} \xrightarrow{\mathrm{HNO}_3} \mathrm{~Pb}\left(\mathrm{NO}_3\right)_2 \xrightarrow{\mathrm{H}_2 \mathrm{SO}_4}$ B $\xrightarrow[\substack{\text { (2) Acetic acid } \\ \text { (3) } \mathrm{K}_2 \mathrm{CrO}_4}]{\substack{\text { (1) Ammonium } \\ \text { acetate }}}$

Which of the following oxidation reactions are carried out by both $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ and $\mathrm{KMnO}_4$ in acidic medium? A. $\Gamma^{-} \rightarrow \mathrm{I}_2$ B. $S^{2-} \rightarrow S$ C. $\mathrm{Fe}^{2+} \rightarrow \mathrm{Fe}^{3+}$ D. $\Gamma^{-} \rightarrow \mathrm{IO}_3{ }^{-}$ E. $\mathrm{S}_2 \mathrm{O}_3{ }^{2-} \rightarrow \mathrm{SO}_4{ }^{2-}$ Choose the correct answer from the options given below:

The type of hybridization and the magnetic property of $\left[\mathrm{MnCl}_6\right]^{3-}$ are :

Which of the following electrolyte can be used to obtain $\mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_8$ by the process of electrolysis?

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:

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:

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:

The orange colour of ${K}_{2}{\mathrm{Cr}}_{2}{O}_{7}$ and purple colour of ${\mathrm{KMnO}}_{4}$ is due to

The incorrect statement regarding ethyne is

The number of complexes from the following with no electrons in the \(t_2\) orbital is \(\qquad\) \(\mathrm{TiCl}_4,\left[\mathrm{MnO}_4\right]^{-},\left[\mathrm{FeO}_4\right]^{2-},\left[\mathrm{FeCl}_4\right]^{-},\left[\mathrm{CoCl}_4\right]^{2-}\)

In chromyl chloride test for confirmation of ${\mathrm{Cl}}^{–}$ ion, a yellow solution is obtained. Acidification of the solution and addition of amyl alcohol and $10%{H}_{2}{O}_{2}$turns organic layer blue indicating formation of chromium pentoxide. The oxidation state of chromium in that is

Total number of electrons present in \(\left(\pi^*\right)\) molecular orbitals of \(\mathrm{O}_2, \mathrm{O}_2{ }^{+}\) and \(\mathrm{O}_2^{-}\) is _______.