In which one of the following molecules, the central atom said to adopt Sp2- hybridisation?
Be F2
BF3
C2H2
NH3
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 one of the following has the highest dipole moment?
As H3
Sb H3
PH3
The ground state electronic configuration of valence shell electrons in nitrogen molecule (N2) is written as
KK, σ2S2, σ*2S2, σ2P2x, π2Py2 ≈ π2Pz2
Bond order in nitrogen molecule is
0
1
2
3
Among the following which compound will show the highest lattice energy?
KF
NaF
CsF
RbF
Strongest hydrogen bonding is shown by
H2O
HF
H2S
When the hybridisation state of carbon atom changes from Sp3 and finally to Sp, the angle between the hybridised orbitals.
Decreases gradually
Decrease considerably
Is not affected
Increases progressively
In a regular octahedral molecule, MX6, the number of X-M-X bonds at 180o is_______________.
6
4
H2O has a net dipole moment while BeF2 has zero dipole moment because
H2O molecule is linear while BeF2 is bent.
BeF2 molecule is linear while H2O is bent.
Fluorine has more electronegativity than oxygen
Beryllium has more electro negativity than oxygen.
Which one of the following statements is not correct for sigma and Pi bonds formed between two carbon atoms?
Free rotation of atoms about a sigma bond is allowed but not in case of Pi bond.
Sigma bond determines the direction between carbon atoms but a Pi bond has no primary effect in this regard.
Sigma bond is stronger than a Pi bond.
Bond energies of sigma and Pi bonds are of the order of 264 KJ / mol and 347 KJ/ mol, respectively.
