Chemical Bonding and Molecular Structure — JEE Main PYQs

Given below are two statements:

Statement I: The number of species among ${\mathrm{SF}}_4$, ${\mathrm{NH}}_4^{+}$, $[{\mathrm{NiCl}}_4]$, ${\mathrm{XeF}}_4$, $[{\mathrm{PtCl}}_4{]}^{2-}$, ${\mathrm{SeF}}_4$ and $[\mathrm{Ni}(\mathrm{CN}{)}_4{]}^{2-}$, that have tetrahedral geometry …

The formal changes on the atoms marked as (1) to (4) in the Lewis representation of ${\mathrm{HnO}}_3$ molecule respectively are

The correct increasing order of $\mathrm{C}-\mathrm{H}(\mathrm{A})$, $\mathrm{C}-\mathrm{O}(\mathrm{B})$, $\mathrm{C}=\mathrm{O}(\mathrm{C})$ and $\mathrm{C}\equiv \mathrm{N}(\mathrm{D})$ bonds in terms of covalent bond length is:

Among ${\mathrm{H}}_2\mathrm{S},{\mathrm{H}}_2\mathrm{O},{\mathrm{NF}}_3,{\mathrm{NH}}_3$ and ${\mathrm{CHCl}}_3$, identify the molecule $(\mathrm{X})$ with lowest dipole moment value. The number of lone pairs of electrons present on the central atom of the molecule …

Identify the molecule $(X)$ with maximum number of lone pairs of electrons (obtained using Lewis dot structure) among $\mathrm{HNO}{}_3$, $\mathrm{H}{}_2\mathrm{SO}{}_4$, $\mathrm{NF}{}_3$ and $\mathrm{O}{}_3$. Choose the correct bond angle made by the central atom of the molecule (X).

Given below are statements about some molecules/ions.

Identify the CORRECT statements.
A. The dipole moment value of ${\mathrm{NF}}_3$ is higher than that of ${\mathrm{NH}}_3$.
B. The dipole moment value of ${\mathrm{BeH}}_2$ is zero.
C. The bond order of …

Among the following, the CORRECT combinations are :
A. ${\mathrm{IF}}_3\to$ T-shaped ( ${\mathrm{sp}}^3\mathrm{d}$ )
B. ${\mathrm{IF}}_5\to$ Square pyramidal ( ${\mathrm{sp}}^3{\mathrm{d}}^2$ )
C. ${\mathrm{IF}}_7\to$ Pentagonal bipyramida …

Pair of species among the following having same bond order as well as paramagnetic character will be-

Given below are two statements:

Statement I: The number of species among ${\mathrm{BF}}_4^{-},{\mathrm{SiF}}_4,{\mathrm{XeF}}_4$ and ${\mathrm{SF}}_4$, that have unequal $\mathrm{E}-\mathrm{F}$ bond lengths is two. Here, E is the central atom.

Statement II: Among …

Match List-I with List-II according to shape.

List-I
A. ${\mathrm{XeO}}_3$
B. ${\mathrm{XeF}}_2$
C. ${\mathrm{XeO}}_2{\mathrm{F}}_2$
D. ${\mathrm{XeOF}}_4$

List-II
I. ${\mathrm{BrF}}_5$
II. ${\mathrm{NH}}_3$
III. $\left[{\mathrm{I}}_3\right]$
IV. …

Given below are two statements :

Statement (I) : The correct sequence of bond lengths in the following species is :
${\mathrm{O}}_2^{+}<{\mathrm{O}}_2<{\mathrm{O}}_2^{-}<{\mathrm{O}}_2^{2-}$
Statement (II) : The correct sequence of number of unpaired electrons in the following s …

According to Lewis theory, the total number of $\sigma$ bond-pairs and lone pair of electrons around the central atom of ${\mathrm{XeO}}_6^{4-}$ ion is ______ .

$\mathrm{SF}{}_4$ is isostructural with:
A. $\mathrm{BrF}{}_4{}^{-}$
B. $\mathrm{CH}{}_4$
C. $\mathrm{IF}{}_4{}^{+}$
D. $\mathrm{XeF}{}_4$
E. $\mathrm{XeO}{}_2\mathrm{F}{}_2$

Choose the correct answer from the options given below:

Which of the following pictorial diagram most correctly represents the π* (π-antibonding) molecular orbital between two atoms if the internuclear axis is taken to be in the z-direction (→ z-axis)?

Consider the following molecules/species:

The correct order of carbon-oxygen double bond length is:

Consider the following species


Number of species having sp ${}^{3}d$ hybrid …

The covalent radii of atoms A and B are ${\mathrm{r}}_{\mathrm{A}}$ and ${\mathrm{r}}_{\mathrm{B}}$, respectively. The covalent bond length and total length of AB molecule are respectively :

Given below are two statements :

Statement-I : Aluminium upon reaction with NaOH forms ${\left[\mathrm{Al}(\mathrm{OH}{)}_6\right]}^{3-}$ ion.
Statement-II : The geometry of ${\mathrm{ICl}}_4^{-},{\mathrm{ClO}}_3^{-}$and ${\mathrm{IBr}}_2^{-}$is square planar, pyramidal and …

The pairs among
$\mathrm{A}=[{\mathrm{SO}}_3^{2-},{\mathrm{CO}}_3^{2-}]$, $\mathrm{B}=[{\mathrm{O}}_2^{2-},{\mathrm{F}}_2]$, $\mathrm{C}=[{\mathrm{CN}}^{-},\mathrm{CO}]$, $\mathrm{D}=[{\mathrm{NH}}_3,{\mathrm{H}}_3{\mathrm{O}}^{+}]$ and …

Arrange the following compounds according to increasing order of boiling points.
$\mathrm{n}-{\mathrm{C}}_4{\mathrm{H}}_9\mathrm{OH}(\mathrm{A})$, $\mathrm{n}-{\mathrm{C}}_4{\mathrm{H}}_9{\mathrm{NH}}_2(\mathrm{B})$, $\mathrm{n}-{\mathrm{C}}_4{\mathrm{H}}_{10}(\mathrm{C})$ and …

Given below are two statements:

Statement I: The number of compounds among ${\mathrm{SO}}_2,{\mathrm{SO}}_3,{\mathrm{SF}}_4,{\mathrm{SF}}_6$ and ${\mathrm{H}}_2\mathrm{S}$ in which sulphur does not obey the Octet rule is 3 .

Statement II : Among …

Given below are two statements :

Statement I: ${\mathrm{F}}_2\mathrm{O}<{\mathrm{H}}_2\mathrm{O}<{\mathrm{Cl}}_2\mathrm{O}$ is the correct trend in terms of bond angle.
Statement II : ${\mathrm{SiF}}_4,{\mathrm{SnF}}_4$ and ${\mathrm{PbF}}_4$ are ionic in nature.
In th …

Shown below is the structure of methyl acetate with three different α, β and γ carbon-oxygen bonds.

(see structure)

The correct order of bond length of these bonds is :

Given below are two statements :

Statement-I : Due to increase in van der Waals forces, the order of boiling points is ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{I}>{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{I}>{\mathrm{CH}}_3\mathrm{I}$.

Statement-II : As (see str …

Bromine trifluoride autoionizes to form BrF2+ and BrF4-. The shapes of the cation and anion are respectively ____ and ____.

The number of molecules/ions that show linear geometry among the following is ____。 …

Arrange the following compounds in increasing order of their dipole moment :
$\mathrm{HBr}$, ${\mathrm{H}}_2\mathrm{S}$, ${\mathrm{NF}}_3$ and ${\mathrm{CHCl}}_3$

Which of the following linear combination of atomic orbitals will lead to formation of molecular orbitals in homonuclear diatomic molecules [internuclear axis in z-direction] ?
A. $2{\mathrm{p}}_{\mathrm{z}}$ and $2{\mathrm{p}}_{\mathrm{x}}$
B. 2 s and …

Which of the following statement is true with respect to ${\mathrm{H}}_2\mathrm{O},{\mathrm{NH}}_3$ and ${\mathrm{CH}}_4$ ?
A. The central atoms of all the molecules are ${\mathrm{sp}}^3$ hybridized.
B. The …

In the given structure, number of sp and ${\mathrm{sp}}^2$ hybridized carbon atoms present respectively are :

Given below are two statements :

Statement(I) : Experimentally determined oxygen-oxygen bond lengths in the ${\mathrm{O}}_3$ are found to be same and the bond length is greater than that of a $\mathrm{O}=\mathrm{O}$ (double bond) but less than that of a single …

Match the LIST-I with LIST-II

Consider 'n' is the number of lone pair of electrons present in the equatorial position of the most stable structure of ${\mathrm{ClF}}_3$. The ions from the following with 'n' number of unpaired electrons are :
A. ${\mathrm{V}}^{3+}$
B. ${\mathrm{Ti}}^{3+}$
C. ${\mathrm{Cu}}^{2+}$
D. …

The molecules having square pyramidal geometry are

The sum of sigma ($\sigma$) and pi($\pi$) bonds in Hex-1,3-dien-5-yne is ______.

Total number of non bonded electrons present in ${\mathrm{NO}}_2^{-}$ ion based on Lewis theory is ____.

Among $\mathrm{SO}{}_2$, $\mathrm{NF}{}_3$, $\mathrm{NH}{}_3$, $\mathrm{XeF}{}_2$, $\mathrm{ClF}{}_3$ and $\mathrm{SF}{}_4$, the hybridization of the molecule with non-zero dipole moment and highest number of lone-pairs of electrons on the central atom is

A molecule with the formula ${\mathrm{AX}}_4\mathrm{Y}$ has all it's elements from p-block. Element A is rarest, monoatomic, non-radioactive from its group and has the lowest ionization enthalpy value among A, X and Y . Elements X and Y have first and second highest electronegat …

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 ?

Given below are two statements:

Statement (I): for $\mathrm{ClF}{}_3$, all three possible structures may be drawn as follows.

Statement (II): Structure III is most stable, as the orbitals having the lone pairs are axial, where the $\ell p-bp$ repulsion is minimum.

In the light of the …

Which of the following molecules(s) show/s paramagnetic behavior?
(A) ${\mathrm{O}}_2$
(B) ${\mathrm{N}}_2$
(C) ${\mathrm{F}}_2$
(D) ${\mathrm{S}}_2$
(E) ${\mathrm{Cl}}_2$

Choose the correct answer from the options given below:

In ${\mathrm{SO}}_2,{\mathrm{NO}}_2^{-}$ and ${\mathrm{N}}_3^{-}$ the hybridizations at the central atom are respectively :

Given below are two statements :

Statement (I) : (see structure A) is more polar than (see structure B)

Statement (II) : Boiling point of (see structure C) is lower than (see structure D) but it is more polar than (see structure E)

In the light of the above statements, choose …

Which one of the following molecules has maximum dipole moment?

Number of molecules/ions from the following in which the central atom is involved in ${\mathrm{sp}}^3$ hybridization is ____.
${\mathrm{NO}}_3{}^{-},{\mathrm{BCl}}_3,{\mathrm{ClO}}_2{}^{-},{\mathrm{ClO}}_3$

Number of molecules/species from the following having one unpaired electron is _____.
${\mathrm{O}}_2,{\mathrm{O}}_2^{-1},\mathrm{NO},{\mathrm{CN}}^{-1},{\mathrm{O}}_2^{2-}$

The correct statement/s about Hydrogen bonding is/are :
A. Hydrogen bonding exists when H is covalently bonded to the highly electro negative atom.
B. Intermolecular H bonding is present in o-nitro phenol
C. Intramolecular H bonding is present in HF .
D. The magnitude of H bondin …

The number of species from the following that have pyramidal geometry around the central atom is
${\mathrm{S}}_2{\mathrm{O}}_3^{2-}$, ${\mathrm{SO}}_4^{2-}$, ${\mathrm{SO}}_3^{2-}$, ${\mathrm{S}}_2{\mathrm{O}}_7^{2-}$

Number of compounds/species from the following with non-zero dipole moment is
${\mathrm{BeCl}}_2$, ${\mathrm{BCl}}_3$, ${\mathrm{NF}}_3$, ${\mathrm{XeF}}_4$, ${\mathrm{CCl}}_4$, ${\mathrm{H}}_2\mathrm{O}$, ${\mathrm{H}}_2\mathrm{S}$, $\mathrm{HBr}$, ${\mathrm{CO}}_2$, …

The total number of 'sigma' and 'Pi' bonds in 2-oxohex-4-ynoic acid is ____.