Linear combination of two hybridised orbitals belonging to the two atoms, each having one electron leads to a
Sigma bond
Double bond
coordinate bond
Pi-bond
Which of the following does not have a tetrahedral structure?
BH-4
BH3
NH+4
H2O
The correct order of N-O bond lengths in NO, NO-2, NO-3 and N2O4 is
NO-2O4 > NO-2 > NO-3>NO
NO> NO-3>N2O4 >NO-2
NO-3 > NO-2 > N2O4>NO
NO > N2O4 > NO-2 > NO-3
Among LiCI, BeCI2, BCI3 and CCI4, the covalent bond character follows the order
LiCI < BeCI2 > BCI3 > CCI4
LiCI < BeCI2 < BCI3 > CCI4
LiCI < BeCI2 < BCI3 < CCI4
LiCI > BeCI2 > BCI3 > CCI4
The dielectric constant of H2O is 80. The electrostatic force of attraction between Na+ and CI- will be.
Reduced to 1/40 in water than in air
Reduced to 1/80 in water than in air
Will be increased to 80 in water than in air
Will remain unchanged
The molecule which does not exhibit dipole moment is
NH3
CHCI3
CCI4
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
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 one of the following has the highest dipole moment?
AsH3
SbH3
PH3
The weaker among the following types of bond is
ionic
covalent
metallic
H-bond
