Which of the following does not have a tetrahedral structure?
BH-4
BH3
NH+4
H2O
Chemical Bonding
0
1
2
3
Among the following group which represents the collection of isoelectronic species?
NO, CN-, N2, O-2
NO+, C2-2, O-2, CO
N2, C2-2 , CO, NO
CO, NO+ , CN- , C2-2
AsF5 molecule is trigonal bipyramidal. The hybrid orbitals used by As atoms for bonding are
dx2-y2,dz2, s,px,py
dxy, s, px, py,pz
s,px,py,pz,dxy
dx2-y2,s,px,py,pz
Which of the following is not isostructural with SiCl4?
SCI4
SO2-4
PO3-4
When the hybridisaiton state of carbon atom changes from sp3 to sp2 and finally to sp, the angle between the hybridised orbitals
Decreases gradually
Decreases considerably
Is not affected
Increases progressively
An sp3- hybrid orbital contains
1/4 s- character
1/2 s- character
1/3 s-character
2/3 s- character
Which one of the following has the highest dipole moment?
AsH3
SbH3
PH3
NH3
Which of the following statements is not correct for sigma and pi bonds formed between two carbon atoms?
Free rotation of atoms about a sigma bond is allowed but not in case of a pi bond
Sigma bond determines the direction between carbon atoms but a pi bond has no primary effect in this regard
Sigma bond is stronger than a pi bond
Bond energies of sigma and pi bonds are of the order of 264 kJ/mol and 347 kJ/mol respectively.
Which of the following two are isostructural?
XeF2, IF-2
NH3, BF3
CO2-3 , SO2-3
PCl5, ICI5
