Advertisements
Advertisements
Question
BF3 molecule is planar but NH3 pyramidal. Explain.
Advertisements
Solution
- In the BF3 molecule, the central boron atom undergoes sp2 hybridization giving rise to three sp2 hybridized orbitals directed towards three corners of an equilateral triangle. Thus, the geometry is trigonal planar.
- In the NH3 molecule, the central nitrogen atom undergoes sp3 hybridization giving rise to four sp3 hybridized orbitals directed towards four corners of a tetrahedron. The expected geometry of the NH3 molecule is regular tetrahedral with a bond angle of 109°28'. There is one lone pair of electrons in one of the sp3 hybrid orbitals of nitrogen. The lone pair–bond pair repulsion distorts the bond angle. Hence, the structure of NH3 is distorted and it has pyramidal geometry.
APPEARS IN
RELATED QUESTIONS
Select and write the most appropriate alternatives from the given choices.
Which O2 molecule is paramagnetic. It is explained on the basis of ______.
Draw an orbital diagram of Hydrogen fluoride molecule
Arrange the following compounds on the basis of lattice energies in decreasing (descending) order:
BeF2, AlCl3, LiCl, CaCl2, NaCl
Give the total number of electrons around sulfur (S) in SF6 compound.
Why is O2 molecule paramagnetic?
Assertion: Oxygen molecule is paramagnetic.
Reason: It has two unpaired electron in its bonding molecular orbital.
Pick out the incorrect statement from the following:
Draw the M.O diagram for oxygen molecule calculate its bond order and show that O2 is paramagnetic.
Draw MO diagram of CO and calculate its bond order.
Hydrogen gas is diatomic whereas inert gases are monoatomic – Explain on the basis of MO theory.
4p, 4d, 5s and 5p orbitals are arranged in the order of decreasing energy. The CORRECT option is:
What is the bond order of B2 molecule?
Among the following MOs, the highest energy MO that is occupied by electrons in case of N2 molecule is ______.
According to MOT, the number of unpaired electrons in O2 molecule is ____________.
Identify the CORRECT option according to MOT.
According to molecular orbital theory, antibonding molecular orbitals of O2 contain ____________.
Which element among the following does NOT form diatomic molecules?
The electronic configuration of Be2 molecule according MOT is ______.
Bonding in which of the following diatomic molecule(s) become(s) stronger, on the basis of MO Theory, by removal of an electron?
(A) NO
(B) N2
(C) O2
(D) C2
(E) B2
Choose the most appropriate answer from the options given below:
Which element among the following does not form diatomic molecules?
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, chose the most appropriate answer from the options given below:
In \[\ce{O^-2}\], O2, and \[\ce{O^{2-}2}\] molecular species, the total number of antibonding electrons, respectively, are:
According to MO theory which of the following lists ranks the nitrogen species in terms of increasing bond order?
What is the number of unpaired electrons present in O2 molecule?
