The angle between the overlapping of one s- orbtial and one p- orbital is
180o
120o
109o 28'
120o 60'
Among the following, the pair in which the two species are not isostructural, is
Si F4 and SF4
IO3- and Xe O3
BH4- and NH4+
PFG- and SF6
Which one of the following statement is not correct?
Double bond is shorter than a single bond
Sigma bond is weaker than a π(pi) bond.
Double bond is stronger than a single bond
Covalent bond is stronger than hydrogen bond
In which one of the following molecules, the central atom said to adopt sp2- hybridisation?
Be F2
BF3
C2H2
Which one shows maximum hydrogen bonding?
H2O
H2Se
H2S
HF
The dielectric constant of H2O is 80. The electrostatic force of attraction between Na+ and Cl- 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 compounds is covalent ?
H2
CaO
KCl
Na2S
Equilateral shape has
sp - hybridization
sp2- hybridization
sp3- hybridization
dsp2- hybridization
The weakest among the following types of bond is _________.
Ionic
Covalent
Metallic
H- bond
Linus Pauling received the Nobel prize for his work on ____________.
Atomic structure
Photosynthesis
Chemical bonds
Thermodynamics
