JEE Main Chemistry — Inorganic Chemistry previous year questions with solutions.
The incorrect statement from the following for borazine is:
What is the number of unpaired electron(s) in the highest occupied molecular orbital of the following species : ${N}_{2},N{}_{2}^{+},{O}_{2},{O}_{2}^{+}$ ?
Given below are two statements: one is labelled as “Assertion A” and the other is labelled as “Reason R” Assertion A : In the complex $\mathrm{Ni}(\mathrm{CO}{)}_{4}$ and $\mathrm{Fe}(\mathrm{CO}{)}_{5}$, the metals have zero oxidation state. Reason R : Low oxidation states are found when a complex has ligands capable of $\pi$-donor character in addition to the $\sigma$-bonding. In the light of the above statements, choose the most appropriate answer from the options given below
A chloride salt solution acidified with dil. ${\mathrm{HNO}}_{3}$ gives a curdy white precipitate, $[A]$, on addition of ${\mathrm{AgNO}}_{3}$. [A] on treatment with ${\mathrm{NH}}_{4}\mathrm{OH}$ gives a clear solution, B.
In Chromyl chloride, the oxidation state of chromium is $(+)$ ___________.
How many of the following metal ions have similar value of spin only magnetic moment in gaseous state? ________ (Given: Atomic number$:V,23;\mathrm{Cr},24;\mathrm{Fe},26;\mathrm{Ni},28)$ ${V}^{3+},{\mathrm{Cr}}^{3+},{\mathrm{Fe}}^{2+},{\mathrm{Ni}}^{3+}$
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 : Statement I : ${\mathrm{SO}}_{2}$ and ${H}_{2}O$ both possess V-shaped structure Statement II : The bond angle of ${\mathrm{SO}}_{2}$ is less than that of ${H}_{2}O$. In the light of the above statements, choose the most appropriate answer from the options given below:
The ratio of spin-only magnetic moment values ${\mu }_{\mathrm{eff}}{[\mathrm{Cr}(\mathrm{CN}{)}_{6}]}^{3-}/{\mu }_{\mathrm{eff}}{[\mathrm{Cr}({H}_{2}O)6]}^{3+}$ is _______
The correct increasing order of the ionic radii is
The octahedral diamagnetic low spin complex among the following is
In ammonium$-$phosphomolybdate, the oxidation state of $\mathrm{Mo}$ is $+_______$
The number of species trom the following carrying a single lone pair on central atom Xenon is ${\mathrm{XeF}}_{5}^{+},{\mathrm{XeO}}_{3},{\mathrm{XeO}}_{2}{F}_{2},{\mathrm{XeF}}_{5}^{-},{\mathrm{XeO}}_{3}{F}_{2},{\mathrm{XeOF}}_{4},{\mathrm{XeF}}_{4}$
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:
The mismatched combinations are A. Chlorophyll$–\mathrm{Co}$ B. Water hardness$–\mathrm{EDTA}$ C. Photography$-{[\mathrm{Ag}(\mathrm{CN}{)}_{2}]}^{-}$ D. Wilkinson catalyst$-[{({\mathrm{Ph}}_{3}P)}_{3}\mathrm{RhCl}]$ E. Chelating ligand$–D-$Penicillamine Choose the correct answer from the options given below.
A solution of ${\mathrm{CrO}}_{5}$ in amyl alcohol has a....colour
Which of the following complex is octahedral, diamagnetic and the most stable?
The total number of lone pairs of electrons on oxygen atoms of ozone is
A solution of ${\mathrm{FeCl}}_{3}$ when treated with ${K}_{4}[\mathrm{Fe}(\mathrm{CN}{)}_{6}]$ gives a prussian blue precipitate due to the formation of
The sum of lone pairs present on the central atom of the interhalogen ${\mathrm{IF}}_{5}$ and ${\mathrm{IF}}_{7}$ is ______
The spin only magnetic moment of ${[\mathrm{Mn}{({H}_{2}O)}_{6}]}^{2+}$ complexes is $B.M.$ (Nearest integer) (Given atomic number of $\mathrm{Mn}=25$)
In chromyl chloride, the number of d-electrons present on chromium is same as in (Given at no. of $\mathrm{Ti}:22,V:23,\mathrm{Cr}:24,\mathrm{Mn}:25,\mathrm{Fe}:26$)
The number of molecules from the following which contain only two lone pair of electrons is _____________ ${H}_{2}O,{N}_{2},\mathrm{CO},{\mathrm{XeF}}_{4},{\mathrm{NH}}_{3},\mathrm{NO},{\mathrm{CO}}_{2},{F}_{2}$
Which of the following is correct order of ligand field strength?