In which of the following molecules, the central atom said to adopt sp2-hybridisation?
BeF2
BF3
C2H2
NH3
Which one shows maximum hydrogen bonding?
H2O
H2Se
H2S
HF
The weaker among the following types of bond is
ionic
covalent
metallic
H-bond
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
Which of the following molecules does not have a linear arrangement of atoms?
BeH2
CO2
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
The angle between the overlapping of one s-orbital and one p-orbital is
180o
120o
109o28'
120o,60'
Which one of the following has the highest dipole moment?
AsH3
SbH3
PH3
An sp3- hybrid orbital contains
1/4 s- character
1/2 s- character
1/3 s-character
2/3 s- character
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
