Chemical Bonding & Molecular Structure

According to molecular orbital theory, which of the following is true with respect to Li2+ and Li2\(-\) ?

In which of the following process, the bond order has increased and paramagnetic character has charged to diamagnetic ?

Among the following, the molecule expected
to be stabilized by anion formation is :
C2, O2, NO, F2

Among the following species, the diamagnetic
molecule is

HF has highest boiling point among hydrogen
halides, because it has :

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

The correct statement about ICl5 and \(ICl_4^-\) is

The covalent alkaline earth metal halide
(X = Cl, Br, I) is :

Among the following molecules / ions,
\(C_2^{2 - },N_2^{2 - },O_2^{2 - },{O_2}\)
which one is diamagnetic and has the shortest
bond length?

The correct statement among the following is :

The type of hybridisation and number of lone pair (s) of electrons of Xe in XeOF4, respectively, are:

Two pi and half sigma bonds are present in :

The pair that contains two P – H bonds in each of the oxoacids is

The oxoacid of sulphur that does not contain bond between sulphur atoms is

During the change of O2 to O2-
, the incoming electron goes to the orbital :

Which of the following conversions involves change in both shape and hybridisation ?

The incorrect geometry is represented by :

Identify the pair in which the geometry of the species is \(T\)-shape and square - pyramidal, respectively :

In the molecular orbital diagram for the molecular ion, N2+, the number of electrons in the \(\sigma\)2pz molecular orbital is :

The decreasing order of bond angles in BF3, NH3, PF3 and I3- is :

In hydrogen azide (above) the bond orders of bond (I) and (II) are :

Which of the following best describes the diagram below of a molecular orbital ?

According to molecular orbital theory, which of the following will not be a viable molecule?

Which of the following compounds contain(s) no covalent bond(s)?
KCl, PH3, O2, B2H6, H2SO4

Total number of lone pair of electrons in \({\rm I}_3^ -\) ion is

The group having triangular planar structures is :

sp3d2 hybridization is not displayed by :

Which of the following is paramagnetic ?

Which of the following species is not paramagnetic?

The group of molecules having identical shape is :

The bond angle H - X - H is the greatest in the compound :

The species in which the $\mathrm{N}$ atom is in a state of $s p$ hybridization is :

The intermolecular interaction that is dependent on the inverse cube of distance between the molecule is:

In which of the following pairs of molecules/ions, both the species are not likely to exist?

Which one of the following molecules is expected to exhibit diamagnetic behaviour?

Stability of the species Li2, \(Li_2^−\) and \(Li_2^+\) increases in the order of:

In which of the following pairs the two species are not isostructural ?

Among the following the maximum covalent character is shown by the compound :

The structure of IF7 is :

The hybridization of orbitals of N atom in \(NO_3^-\), \(NO_2^+\) and \(NH_4^+\) are respectively :

Using MO theory, predict which of the following species has the shortest bond length?

Which of the following pair of species have the same bond order?

The bond dissociation energy of B - F in BF3 is 646 kJ mol-1 whereas that of C - F in CF4 is 515 kj mol-1. The correct reason for higher B - F bond dissociation energy as compared to that of C - F is

Which of the following species exhibits the diamagnetic behaviour?

Which of the following hydrogen bonds is the strongest?

The charge/size ratio of a cation determines its polarizing power. Which one of the following
sequences represents the increasing order of the polarizinig order of the polarizing power of the
cationic species, K+, Ca2+, Mg2+, Be2+?

In which of the following ionization processes, the bond order has increased and the magnetic
behaviour has changed?

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

Which of the following molecules/ions does not contain unpaired electrons?

The decreasing values of bond angles from NH3 (106o) to SbH3 (91o
) down group-15 of the periodic table is due to