AIIMS Chemistry Chemical Bonding And Molecular Structure Class 11 Questions

Which of the following is incorrect about cyanogen gas? (1) It has bent structure (2) It is psuedohalogen. (3) Its behavior is similar to halides. (4) both carbon are sp hybridised

Assertion : $\text{BO}_3^{3-}$ and $\text{SO}_3^{2-}$ are not isostructural. Reason : In $\text{SO}_3^{2-}$, sulphur has one lone pair of electrons.

Which of the following number of lone pair at central atom zero $\text{XeO}_3$,$\text{XeO}_2\text{F}_2$, $\text{XeO}_4$, $\text{XeO}_3\text{F}_2$, $\text{Ba}_2\text{XeF}_4$

Formula of metal oxide with metal deficiency defect in its crystal is $\text{A}_{0.8}\text{O}$ . The crystal contains $\text{A}^{2+}$ and $\text{A}^{3+}$ ions. The fraction of metal existing as $\text{A}^{2+}$ ions in the crystal is -

In $\text{Fe(CO)}_5$, the $\text{Fe--C}$ bond possesses

In which of the following pair both the species have $sp^3$ hybridization?

Correct order of bond dissociation energy

The correct order of $\text{S--S}$ bond length in following oxyanions is: $$\text{(I) S}_2\text{O}_4^{2-}\quad \text{(II) S}_2\text{O}_5^{2-}\quad \text{(III) S}_2\text{O}_6^{2-}$$

In the dimer of phosphorus pentoxide, in what order number of $\text{P}-\text{P}$, $\text{P}=\text{O}$ & $\text{P}-\text{O}-\text{P}$ bonds are there?

Which of the following reacts most slowly with nitric acid?

Assertion: $\text{I}_2\text{O}_5$ is used to detect $\text{CO}$ Reason: In $\text{I}_2\text{O}_5$, the oxidation number of I is 5.

Select the correct statement regarding shapes of $\text{PCl}_5$, $\text{BrF}_5$, & $\text{IF}_7$:

The ion that has sp³d² hybridization for the central atom is:

Assertion : In vapour state, $\text{S}_2$ molecule shows paramagnetic behaviour. Reason : $\text{S}_2$ molecule has two paired electrons in the $\text{antibonding}t_{2g}\text{orbitals like O}_2$.

Assertion: H₂⁺ and ions have the same bond order. Reason: H₂⁺ is less stable than H₂⁻.

Assertion : Melting and boiling points of ionic compounds are inversely proportional to the lattice enthalpy. Reason : Stability of ionic compounds does not depend on the lattice enthalpy.

Assertion: $\text{SF}_4$ molecule has see-saw geometry. Reason: In $\text{SF}_4$ molecule sulphur has four bond pair and one lone pair.

Assertion: In vapour state, S₂ molecules show paramagnetic behavior. Reason: S₂ molecules has two paired electrons in the anti-bonding t₂g³ orbitals like O₂.

Which of the following contains at least one lone pair electrons in all of its halides?

The shapes of SF₄ and XeF₂ respectively are

In which of the following shape is same but hybridization is different:

Which molecule pair do not have identical structure

Correct order of bond angle is:

For N₃⁻ which statement is wrong

% s-character of N–H bond is maximum in :

Which contain at least one $\text{e}^-$ in $\sigma 2\text{p}$ bonding MO

Assertion: SO₂ is more covalent than SeO₂ Reason: Covalent radius of Se is more than S

ClF₂⁻, ClF₄⁻ find out number of lone pair and geometry

Choose the correct.

Which have correct order of dipole moment:

Consider the statements. I. Bond length in N₂⁺ is 0.024 Å greater than N₂ II. Bond length in NO⁺ is 0.094 Å less than in NO. III. O₂²⁻ has shorter bond length than O₂. Which of the following statements are true?

Each of these questions contains two statements, Assertion (A) and Reason (R). Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and (d) given below. Assertion (A) Elementary phosphorus exists in three principal allotropic forms, i.e. white (or yellow), red (or violet) and black. Reason (R) of the three forms, white phosphorus is the most important and most reactive.

Assertion: $\text{O}_3$ has higher boiling point than $\text{O}_2$. Reason: $\text{O}_3$ is allotrope of oxygen.

Assertion : Geometry of $\text{SF}_4$ molecule can be termed as distorted tetrahedron, a folded square or see saw. Reason : Four fluorine atoms surround or form bond with sulphur atom.

Among the following, the true statements are: I. $\text{PH}_5$ and $\text{BiCl}_5$ do not exist II. $p\pi - d\pi$ is present in $\text{SO}_2$. III. electrons travel with speed of light. IV. $\text{SF}_4$ and $\text{CH}_4$ has same shape. V. $\text{I}_3^+$ has bent shape.

In the following questions a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct answer out of the following choice. Assertion (A) Superoxides of alkali metals are paramagnetic in nature. Reason (R) Superoxide contain the ion which has one unpaired electron.

Which of the following molecules has more than one lone pair?

Which of the following reactions does not take place? BF₃ + F⁻ → BF₄⁻ ... (I) BF₃ + 3F⁻ → BF₆³⁻ ... (II) AlF₃ + 3F⁻ → AlF₆³⁻ ... (III)

Four diatomic species are listed below in different sequences. Which of these represents the correct order of their increasing bond order?

Assertion: C–O–H bond angle is less than the normal tetrahedral bond angle. Reason: Lone pair-lone pair repulsion decreases bond angle.

The shapes of SF₄ and XeF₂ respectively are

Consider the statement I. Bond length in N₂⁺ is 0.02Å greater than in N₂. II. Bond length of NO⁺ is 0.09 Å less than in NO. III. O₂²⁻ has shorter bond length than O₂. Which of the following statements are true?

The pair having similar geometry is

The correct order in which the O—O bond length increases is

Assertion Boron always forms covalent bond. Reason The small size of B3+ favours formation of covalent bond.

Total number of antibonding electrons present in O₂ will be

In BF₃, the B – F bond length is 1.30 Å, when BF₃ is allowed to be treated with Me₃N, it forms an adduct, Me₃N→BF₃, the bond length of B – F in the adduct is

Which of the following statement is not true for hydrolysis of XeF₆?

Bleaching powder does not contain

Which of the following ion does not exist?