The weakest among the following types of bond is _________.
Ionic
Covalent
Metallic
H- bond
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
Mark the incorrect statement in the following.
The bond order in the species O2, O2+ and O2- decreases as O2+> O2>O2-
The bond energy in a diatomic molecule always increases when an electron is lost.
Electrons in antibonding molecule contribute to repulsion between two atoms.
With increase in bond order, bond length decreases and bond strength increases.
Which of the following does not apply to metallic bond?
Overlapping valence orbitals
Mobile valence electrons
Delocalised electrons
Highly directed bonds
The boiling point of p- nitrophenol is higher than that of O- nitrophenol because___________.
NO2 group at p- position behave in a different way from that at O- position.
Intramolecular hydrogen bonding exists in p- nitrophenol
There is intermolecular hydrogen bonding in p- nitrophenol.
P- nitrophenol has a higher molecular weight than O- nitrophenol.
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
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
The angle between the overlapping of one s- orbtial and one p- orbital is
180o
120o
109o 28'
120o 60'
The charge on a cation M is +2 and on an anion A is -3. The compound formed by them has the formula :
H2O
NH3
HF
H2S
Which of the following molecule does not have a linear arrangement of atoms?
C2 H2
HCN
CO2
