The molecule which does not exhibit dipole moment is
NH3
CHCI3
H2O
CCI4
N2and O2, are converted into monoanions N-2 and O-2 respectively. Which of the following statements is wrong?
In N2, the N-N bond weakens
In O-2, O-O bond length increase
In O-2, bond order decreases
N-2, becomes diamagnetic
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
The BCI3 is a planar molecule whereas NCI3 is pyramidal because
B - CI bond is more polar than N-CI bond
N-CI bond is more covalent than B-CI bond
Nitrogen atom is smaller than boron atom
BCI3 has no lone pair but NCI3 has a lone pair of electrons
Which of the following molecules does not have a linear arrangement of atoms?
H2S
C2H2
BeH2
CO2
Which one of the following is the correct order of interactions?
Covalent < hydrogen bonding < van der
Van der Waals' < hydrogen bonding < dipole-dipole < covalent
Van der Waal's < dipole-dipole < hydrogen bonding < covalent
Dipole-dipole < van der Waal's < hydrogen bonding < covalent
The high density of water compared to ice is due to
Hydrogen bonding interactions
Dipole-dipole interactions
Dipole-induced dipole interactions
Induced dipole-induced dipole interactions
In which of the following molecules, the central atom said to adopt sp2-hybridisation?
BeF2
BF3
Which of the following does not apply to metallic bond?
Overlapping valence orbitals
Mobile valence electrons
Delocalised electrons
Highly directed bonds
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
