Chemical Bonding and Molecular Structure PYQs

Match List I with List II: Choose the correct answer from the options given below:

Identify the correct statement about ClF₃ from the following options:

The correct formal charges on oxygen atoms numbered 2, 1 and 3 respectively are:

Given below are two statements : Statement I : A hypothetical diatomic molecule with bond order zero is quite stable. Statement II : As bond order increases, the bond length increases. In the light of the above statements, choose the most appropriate answer from the options given below :

Match List-I with List-II Choose the correct answer from the options given below:

Among the given compounds I–III, the correct order of bond dissociation energy of C–H bond marked with * is :

Identify the correct orders against the property mentioned. A. $H_2O$ > $NH_3$ > $CHCl_3$ – dipole moment B. $XeF_4$ > $XeO_3$ > $XeF_2$ – number of lone pairs on central atom C. O-H > C-H > N-O – bond length D. $N_2$ > $O_2$ > $H_2$ – bond enthalpy Choose the correct answer from the options given below :

Match List I with List II. Choose the correct answer from the options given below:

Identify the correct answer.

Amongst the following, the total number of species NOT having eight electrons around central atom in its outermost shell, is $NH_3$, $AlCl_3$, $BeCl_2$, $CCl_4$, $PCl_5$ :

The correct order of energies of molecular orbitals of $N_2$ molecule, is :

The number of σ bonds, π bonds and lone pair of electrons in pyridine, respectively are:

Intermolecular forces are forces of attraction and repulsion between interacting particles that will include : A. dipole-dipole forces. B. dipole-induced dipole forces. C. hydrogen bonding. D. covalent bonding. E. dispersion forces. Choose the most appropriate answer from the options given below :

Amongst the given options which of the following molecules / ion acts as a Lewis acid?

Which amongst the following is incorrect statement?

Amongst the following which one will have maximum 'lone pair - lone pair' electron repulsions?

Choose the correct statement:

BF₃ is planar and electron deficient compound. Hybridization and number of electrons around the central atom, respectively are:

Match List-I with List-II.

Which of the following molecules is non-polar in nature?

Identify a molecule which does not exist.Identify a molecule which does not exist.

Which of the following set of molecules will have zero dipole moment?

Which of the following is paramagnetic?

Which of the following is the correct order of dipole moment?

In the structure of ClF₃, the number of lone pair of electrons on central atom 'Cl' is

Consider the following species: $$CN⁺, CN⁻, NO and CN$$ Which one of these will have the highest bond order?

Which of the following pairs of compounds is isoelectronic and isostructural?

With respect to the conformers of ethane, which of the following statements is true?

Match the interhalogen compounds of column I with the geometry in column II and assign the correct code

The species having bond angles of 120° is

Which one of the following pairs of species have the same bond order?

The hybridizations of atomic orbitals of nitrogen in $NO_2^+$, $NO_3^-$ and $NH_4^+$ respectively are:

Which one of the following fluoro-compounds is most likely to behave as a Lewis base?

Which of the following pairs of ions is isoelectronic and isostructural?

Which of the following pairs of d-orbitals will have electron density along the axes?

The correct geometry and hybridization for $XeF_4$ are:

Among the following, which one is a wrong statement?

In which of the following molecules, all atoms are coplanar?

Decreasing order of stability of $\mathrm{O_2}$, $\mathrm{O_2^-}$, $\mathrm{O_2^+}$ and $\mathrm{O_2^{2-}}$ is:

In which of the following pairs, both the species are not isostructural?

The vacant space in bcc lattice unit cell is:

Which of the statements given below is incorrect?

The variation of the boiling points of the hydrogen halides is in the order HF > HI > HBr > HCl. What explains the higher boiling point of hydrogen fluoride?

The pair of compounds that can exist together is:

Which of the following molecules has the maximum dipole moment?

Which one of the following species has plane triangular shape?

Acidity of diprotic acids in aqueous solutions increases in the order:

Dipole-induced dipole interactions are present in which of the following pairs?

Which is the strongest acid in the following?

Which of the following is paramagnetic?

Which of the following structure is similar to graphite?

$XeF_2$ is isostructural with

Which of these is least likely to act as a Lewis base?

Which of the following is electron-deficient?

Which one of the following molecules contains no $\pi$ bond?

Which of the following is a polar molecule?

The radical $C_6H_5CH_2\cdot$ is aromatic because it has

During change of O₂ to O₂⁻ ion, the electron adds on which one of the following orbitals?

For diatomic species listed below, identify the correct order in which the bond order is increasing in them:

A solid compound XY has NaCl structure. If the radius of the cation is 100 pm, the radius of the anion $(Y^-)$ will be:

Which of the following structures is the most preferred and hence of lowest energy for $SO_3$?

The pairs of species of oxygen and their magnetic behaviours are noted below. Which of the following presents the correct description?

In which of the following molecules, the central atom does not have sp$^3$ hybridization?

Some statements about heavy water are given below : (i) Heavy water is used as a moderator in nuclear reactors. (ii) Heavy water is more associated than ordinary water. (iii) Heavy water is more effective solvent than ordinary water. Which of the above statements are correct?

How many bridging oxygen atoms are present in $P_4O_{10}$ ?

Some of the properties of the two species, $NO_3^-$ and $H_3O^+$ are described below. Which one of them is correct?

In which of the following molecules / ions $BF_3$, $NO_2^-$, $NH_2^-$ and $H_2O$, the central atom is $sp^2$ hybridized?

According to MO theory which of the following lists ranks the nitrogen species in terms of increasing bond order?

In the case of alkali metals, the covalent character decreases in order:

Which of the following oxides is not expected to react with sodium hydroxide?

Which of the following molecules acts as a Lewis acid?

The angular shape of ozone molecule (O₃) consists of

The correct order of increasing bond angles in the following triatomic species is

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

Why does BH₃ dimerize whereas BF₃ does not?

Out of (SiH₃)₂O and (CH₃)₂O, which is more basic and why?

Out of trimethylamine (N(CH₃)₃) and triethylphosphine (P(C₂H₅)₃), which has the higher dipole moment?

Why is B₂ paramagnetic whereas C₂ is diamagnetic?

In which of the following molecules are all the bonds not equal?

The electronegativity difference between N and F is greater than that between N and H, yet the dipole moment of NH₃ (1.5 D) is larger than that of NF₃ (0.2 D). This is because:

The correct order regarding the electronegativity of hybrid orbitals of carbon is:

Which of the following species has a linear shape?

Which of the following is not a correct statement?

The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number 16 is:

Which of the following is not isostructural with SiCl₄?

The correct order in which the O–O bond length increases in the following is:

Which of the following molecules has trigonal planar geometry?

The correct sequence of increasing covalent character is represented by:

Which of the following is the electron deficient molecule?

Which of the following would have a permanent dipole moment?

Which one of the following oxides is expected to exhibit paramagnetic behaviour?