NEET Chemistry Chemical Bonding And Molecular Structure Class 11 Questions

The formation of the oxide ion, O₂−(g), from oxygen atom requires first an exothermic and then an endothermic step as shown below : O(g) + e− → O−(g); ΔH° = −141 kJ mol−1 Ω−(g) + e− → O₂−(g); ΔH° = +780 kJ mol−1 Thus, process of formation of O₂− in gas phase is unfavourable even though O₂− is isoelectronic with neon. It is due to the fact that,

Which of the following statements is not correct from the view point of molecular orbital theory?

Match List I with List II :

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

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. H₂O > NH₃ > CHCl₃ – dipole moment B. XeF₄ > XeO₃ > XeF₂ – number of lone pairs on central atom C. O–H > C–H > N–O – bond length D. N₂ > O₂ > H₂ – bond enthalpy Choose the correct answer from the options given below:

Match List I with List II.

Match List I with List II. List I

Intramolecular hydrogen bonding is present in

Identify the correct answer.

Amongst the following, the total number of species NOT having eight electrons around central atom in its outer most shell, is NH₃, AlCl₃, BeCl₂, CCl₄, PCl₅:

The <strong>correct</strong> order of energies of molecular orbitals of N₂ molecule, is:

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?

Match List – I with List – II.

Amongst the following which one will have maximum ‘lone pair–lone pair’ electron repulsions?

Which amongst the following is INCORRECT statement?

Polar molecules are the molecules :

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.

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

Which of the following diatomic molecular species has only π bonds according to molecular orbital theory?

Match the xenon compounds in column-I with its structure in column-II and assign the CORRECT code:

Which one of the following elements is unable to form MF₆³⁻ ion?

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

Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is 1s²2s²2p³, the simplest formula for this compound is

Among CaH₂, BeH₂, BaH₂, the order of ionic character is

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

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?

Predict the CORRECT order among the following. bond pair – bond pair > lone pair – bond pair > lone pair – lone pair

The pair of electrons in the given carbanion, CH₃C ≡ C⁻ is present in which of the following orbitals?

Consider the molecules CH₄, NH₃ and H₂O. Which of the given statements is FALSE?

Match the compounds given in column-I with the hybridisation and shapes given in column-II and mark the CORRECT option.

The total number of π-bond electrons in the following structure is ______.

Maximum bond angle at nitrogen is present in which of the following?

The correct bond order in the following species is ______.

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

Which of the following options represents the CORRECT bond order?

Which of the following species contains equal number of σ– and π–bonds?

Which of the following molecules has the maximum dipole moment?

Which one of the following species has plane triangular shape?

The pair of species that has the same bond order in the following is:

The outer orbitals of C in ethene molecule can be considered to be hybridized to give three equivalent sp² orbitals. The total number of sigma (σ) and pi(π) bonds in ethene molecule is: