In an octahedral structure, the pair of d orbitals involved in d2sp3-hybridisation is
Equilateral shape has
1. sp hybridisation
2. sp2 hybridisation
3. sp3 hybridisation
4. dsp2 hybridisation
AsF5 molecule is trigonal bipyramidal. The hybrid orbitals used by As-atoms for bonding are
Overlap of which of the following atomic orbitals would be maximum to form the strongest covalent bond.
1. 1s-2s (σ)
2. 1s-2p (σ)
3. 2p-2p (π)
4. 2p-2p (σ)
The types of hybrid orbitals of nitrogen in NO2+, NO3- and NH4+ respectively are expected to be
1. sp, sp3 and sp2
2. sp, sp2 and sp3
3. sp2, sp and sp3
4. sp2, sp3 and sp
Which of the following statement is not correct from the view point of molecular orbital theory ?
1. Be2 is not a stable molecule
2. He2 is not a stable but He2+ is expected to exist.
3. Bond strength of N2 is maximum amongst the homonuclear diatomic molecules belonging to the second period.
4. The order of energies of molecular orbitals in N2 molecule is
s2s < s*2s < s2pz < (p2px=p2py) < (p*2px=p*2py) < s*2pz
Which of the following compound does not exhibit Hydrogen bonding ?
PCl5 is highly unstable and in solid state it exists as into [PCl4]+ and [PCl6]- ions.
The geometry of [PCl6]- is
3. square pyramidal
4. square planar
Which of the following species has maximum number of lone-pair of electrons on the central atom ?
Which of the following gas is least polarizable?