Which of the following does not have a tetrahedral structure?
BH-4
BH3
NH+4
H2O
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
The boiling point of p-nitrophenol is higher than that of o-nitrophenol because
NO2 group at p-posiiton behave in a different way from that at o-position
Intramolecular hydrogen bonding exists in p-nitro phenol
There is intermolecular hydrogen bonding in p-nitrophenol
p-nitrophenol has a higher molecular weight than o-nitrophenol
For two ionic solids CaO and KI, identify the wrong statement among the following
Lattice energy of CaO is much larger than that of KI
KI is soluble in benzene
KI has lower melting point
CaO has higher melting point
Among the following orbital bonds, the angle is minimum between
sp3 bonds
Px and Py orbitals
H - O - H in water
sp bonds
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
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
Among the following which compound will show the highest lattice energy?
KF
NaF
CsF
RbF
The angle between the overlapping of one s-orbital and one p-orbital is
180o
120o
109o28'
120o,60'
