JEE Main Chemistry — Inorganic Chemistry previous year questions with solutions.
Correct statements among regarding silicones are: $(a)$ They are polymers with hydrophobic character. $(b)$ They are biocompatible. $(c)$ In general, they have high thermal stability and low dielectric strength. $(d)$ Usually, they are resistant to oxidation and used as greases.
The element that usually does NOT show variable oxidation states is:
The maximum number of possible oxidation states of actinoids are shown by:
Two complexes $[\mathrm{Cr}{({H}_{2}O)}_{6 }]{\mathrm{Cl}}_{3} (A)$ and $[\mathrm{Cr}{({\mathrm{NH}}_{3})}_{6}]{\mathrm{Cl}}_{3}(B)$ are violet and yellow coloured, respectively, The incorrect statement regarding them is:
During the change of ${O}_{2}$ to ${O}_{2}^{-}$ , the incoming electron goes to the orbital:
Good reducing nature of ${H}_{3}P{O}_{2}$ is attributed to the presence of:
The compound used in the treatment of lead poisoning is:
The type of hybridization and no. of lone pair(s) of electron of $Xe$ in $XeO{F}_{4}$ , respectively, are:
The size of the iso-electronic species $C{l}^{-}$ , Ar and $C{a}^{2+}$ is affected by:
In graphite and diamond, the percentage of p-characters of the hybrid orbitals in hybridization respectively, are
Which of the following best describes the diagram of molecular orbital? 
The number of $\mathrm{P}-\mathrm{O}$ bonds in $\mathrm{P}_4 \mathrm{O}_6$ is:
The decreasing order of bond angles in${\mathrm{BF}}_{3}, {\mathrm{NH}}_{3},{\mathrm{PF}}_{3}$ and ${I}_{3}^{-}$ is:
Xenon hexafluoride on partial hydrolysis produces compounds ' $\mathrm{X}$ ' and ' $\mathrm{Y}$ '. Compounds ' $\mathrm{X}$ ' and ' $\mathrm{Y}$ ' and the oxidation state of $\mathrm{Xe}$ are respectively :
 In hydrogen azide, the bond orders of bonds (I) and (II) are ______.
Total number of lone pair of electrons in ${{I}_{3}}^{-}$ ion is:
According to molecular orbital theory, which of the following molecule will not be available?
The decreasing order of bond angles in $\mathrm{BF}_3, \mathrm{NH}_3, \mathrm{PF}_3$ and $\mathrm{I}_3^{-}$is :
In the molecular orbital diagram for the molecular ion ${N}_{2}^{+}$ , the number of electrons in the ${\sigma }_{2p}$ molecular orbital is
For $\mathrm{Na}^{+}, \mathrm{Mg}^{2+}, \mathrm{F}^{-}$and $\mathrm{O}^{2-}$; the correct order of increasing Ionic radii is :
Lithium aluminium hydride reacts with silicon tetrachloride to form:
Consider the following reaction and statements: ${[\mathrm{Co}{({\mathrm{NH}}_{3})}_{4}{\mathrm{Br}}_{2}]}^{+}+{\mathrm{Br}}^{-}\rightarrow [\mathrm{Co}{({\mathrm{NH}}_{3})}_{3}{\mathrm{Br}}_{3}]+{\mathrm{NH}}_{3}$ (i) Two isomers are produced if the reactant complex ion is a cis-isomer. (ii) Two isomers are produced if the reactant complex ion is a trans-isomer. (iii) Only one isomer is produced if the reactant complex ion is a trans-isomer. (iv) Only one isomer is produced if the reactant complex ion is a cis-isomer. The correct statements are
Xenon hexafluoride on partial hydrolysis produces compounds 'X' and 'Y' and the respective oxidation states of Xe are:
The correct order of spin-only magnetic moments among the following is: (Atomic number: $\mathrm{Mn}=$ $25, \mathrm{Co}=27, \mathrm{Ni}=28, \mathrm{Zn}=30$ )