JEE Main Chemistry — Inorganic Chemistry previous year questions with solutions.
Aluminium chloride in acidified aqueous solution forms an ion having geometry
Consider the following elements.  Which of the following is/are true about ${A}^{'},{B}^{'},{C}^{'}$ and ${D}^{'}$ ? A. Order of atomic radii: ${B}^{'}<{A}^{'}<{D}^{'}<{C}^{'}$ B. Order of metallic character : ${B}^{'}<{A}^{'}<{D}^{'}<{C}^{'}$ C. Size of the element : ${D}^{'}<{C}^{'}<{B}^{'}<{A}^{'}$ D. Order of ionic radii : ${{B}^{'}}^{+}<{{A}^{'}}^{+}<{{D}^{'}}^{+}<{{C}^{'}}^{+}$ Choose the correct answer from the options given below:
The shape of carbocation is :
Consider the following test for a group-IV cation. \(\begin{aligned} & \mathrm{M}^{2+}+\mathrm{H}_2 \mathrm{~S} \rightarrow \mathrm{A} \text { (Black precipitate) }+ \text { by product } \\ & \mathrm{A}+\text { aqua regia } \rightarrow \mathrm{B}+\mathrm{NOCl}+\mathrm{S}+\mathrm{H}_2 \mathrm{O} \\ & \mathrm{B}+\mathrm{KNO}_2+\mathrm{CH}_3 \mathrm{COOH} \rightarrow \mathrm{C}+\text { by product } \end{aligned}\) The spin-only magnetic moment value of the metal complex \(\mathrm{C}\) is ______ BM (Nearest integer)
 In a borax bead test under hot condition, a metal salt (one from the given) is heated at point B of the flame, resulted in green colour salt bead. The spin-only magnetic moment value of the salt is _______ BM (Nearest integer) [Given atomic number of \(\mathrm{Cu}=29, \mathrm{Ni}=28, \mathrm{Mn}=25, \mathrm{Fe}=26\)]
During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in \(\mathrm{NH}_4 \mathrm{OH}\) solution when sodium carbonate extract was first acidified with dil. \(\mathrm{HNO}_3\) and then \(\mathrm{AgNO}_3\) solution was added. This indicates presence of :
Match List - I with List - II. \(\begin{array}{ll} \text{List - I} & \text{List - II} \\ \text{Reaction} & \text{Type of redox reaction} \\ \text{(A) } \mathrm{Li} & \text{(I) } 589.2 \\ \text{(B) } \mathrm{Na} & \text{(II) } 455.5 \\ \text{(C) } \mathrm{Rb} & \text{(III) } 670.8 \\ \text{(D) } \mathrm{Cs} & \text{(IV) } 780.0 \\ \end{array}\) Choose the correct answer from the options given below :
The compound that is white in color is
In the precipitation of the iron group (III) in qualitative analysis, ammonium chloride is added before adding ammonium hydroxide to :
On passing a gas, '$X$', through Nessler's reagent, a brown precipitate is obtained. The gas '$X$ ' is
Given below are two statements: Statement (I): A solution of ${[\mathrm{Ni}{({H}_{2}O)}_{6}]}^{2+}$ is green in colour. Statement (II): A solution of ${[\mathrm{Ni}(\mathrm{CN}{)}_{4}]}^{2-}$ is colourless. In the light of the above statements, choose the most appropriate answer from the options given below:
Alkaline oxidative fusion of ${\mathrm{MnO}}_{2}$ gives "$A$ " which on electrolytic oxidation in alkaline solution produces $B.A$and $B$ respectively are:
What will be the decreasing order of basic strength of the following conjugate bases? \({ }^{-} \mathrm{OH}, \mathrm{R} \overline{\mathrm{O}}, \mathrm{CH}_3 \mathrm{CO} \overline{\mathrm{O}}, \mathrm{C} \overline{\mathrm{I}}\)
Total number of species from the following with central atom utilising \(\mathrm{sp}^2\) hybrid orbitals for bonding is _____. \(\mathrm{NH}_3, \mathrm{SO}_2, \mathrm{SiO}_2, \mathrm{BeCl}_2, \mathrm{C}_2 \mathrm{H}_2, \mathrm{C}_2 \mathrm{H}_4, \mathrm{BCl}_3, \mathrm{HCHO}, \mathrm{C}_6 \mathrm{H}_6, \mathrm{BF}_3, \mathrm{C}_2 \mathrm{H}_4 \mathrm{Cl}_2\)
Which of the following acts as a strong reducing agent? (Atomic number : $\mathrm{Ce}=58,\mathrm{Eu}=63$, $\mathrm{Gd}=64,\mathrm{Lu}=71)$
The number of ions from the following that are expected to behave as oxidising agent is : \(\mathrm{Sn}^{4+}, \mathrm{Sn}^{2+}, \mathrm{Pb}^{2+}, \mathrm{Tl}^{3+}, \mathrm{Pb}^{4+}, \mathrm{Tl}^{+}\)
Which one of the following molecules has maximum dipole moment?
Identify from the following species in which ${d}^{2}{\mathrm{sp}}^{3}$ hybridization is shown by central atom:
Sum of bond order of $\mathrm{CO}$ and ${\mathrm{NO}}^{+}$ is
The number of molecules/ion/s having trigonal bipyramidal shape is …….. . ${\mathrm{PF}}_{5},{\mathrm{BrF}}_{5},{\mathrm{PCl}}_{5},{[{\mathrm{PtCl}}_{4}]}^{2-},{\mathrm{BF}}_{3},\mathrm{Fe}(\mathrm{CO}{)}_{5}$
Number of molecules from the following which can exhibit hydrogen bonding is _______ (nearest integer) 
Which of the following is least ionic?
The $\mathrm{Cl}-\mathrm{Co}-\mathrm{Cl}$ bond angle values in a fac- $[\mathrm{Co}{({\mathrm{NH}}_{3})}_{3}{\mathrm{Cl}}_{3}]$ complex is/are:
The total number of stereoisomers for the complex $[\mathrm{Cr}(\mathrm{ox}{)}_{2}\mathrm{ClBr}{]}^{3–}$ (where ox = oxalate) is