AIPMT-PRELIMS Chemistry Chemical Bonding and Molecular Structure Class 11 Questions

Which one of the following pairs is isostructural (i.e. having the same shape and hybridization)?

Which of the following species contains three bond pairs and one lone pair around the central atom?

The correct order of increasing bond length of C−H, C−O, C−C and C=C is

Which of the pairs given below have the geometry that is explained by the same hybridization of orbitals, NO₂⁻, NO₃⁻, NH₂⁻, NH₄⁺, SCN⁻?

Which of the following is least likely to behave as Lewis base?

Which of the following has the minimum bond length?

Which one of the following species does not exist under normal conditions?

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

In which of the following pairs of molecules, the central atoms have sp² hybridization?

The tendency of BF₃, BCl₃ and BBr₃ to behave as Lewis acid decreases in the sequence

In which one of the following species the central atom has the type of hybridisation which is not the same as that present in the other three?

Which of the following molecules acts as a Lewis acid?

The energy absorbed by each molecule (A₂) of a substance is 4.4 × 10⁻¹⁹ J and bond energy per molecule is 4.0 × 10⁻¹⁹ J. The kinetic energy of the molecule per atom will be:

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

Which of the following molecules acts as a Lewis acid?

In which of the following molecules / ions BF₃, NO₂⁻, NH₂⁻ and H₂O, the central atom is sp² hybridized?

The sequence of ionic mobility in aqueous solutions is -

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

The angular shape of ozone molecule (O₃) consists of -

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

In which of the following pairs, the two species are iso-structure?

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?

Among the following, the pair in which the two species are not isostructural is :-

H₂O is dipolar, whereas BeF₂ is not. It is because:-

In BrF₃ molecule, the lone pairs occupy equatorial positions to minimize :-

Which of the following statements is not correct for sigma- and pi- bonds formed between two carbon atoms:

Which of the following is iso-electronic :-

Which of the following has pπ – dπ bonding

In NO₃⁻ ion number of bond pair and lonepair of electrons on nitrogen atom are :-

Which of the following two species in the pair are isostructural :

In which of the following bond angle is maximum :

In X⁻ H ----- Y, X and Y both are electronegative elements :

Main axis of a diatomic molecule is z, molecular orbital pₓ and pᵧ overlaps to form, which of the following orbital :

Nitrogen form N₂, but phosphorous form P₂, it's at a time convert in P₄ reason is :

Which of the following compound is electron deficient :

dpi - ppi bond present in :

Which compound form linear polymer due to H⁻bond :

Correct order of dissociation energy of N₂ and N₂⁺ is :