In a regular octahedral molecule, MX6, the number of X-M-X bonds at 180o is_______________.
3
2
6
4
Among the following which compound will show the highest lattice energy?
KF
NaF
CsF
RbF
H2O, is dipolar, whereas Be F2 is not. It is because
The electro negativity of F is greater than that of O
H2O involves hydrogen bonding whereas Be F2 is a discrete molecule.
H2O is linear and Be F2 is angular
H2O is angular and BeF2 is linear .
Which of the following molecule does not have a linear arrangement of atoms?
H2S
C2 H2
Be H2
CO2
Among LiCl, BeCl2, BCl3 and CCl4, the covalent bond character follows the order.
LiCl< BeCl2> BCl3> CCl4
LiCl< BeCl2< BCl3> CCl4
LiCl< BeCl2< BCl3< CCl4
LiCl> BeCl2> BCl3> CCl4
Which one shows maximum hydrogen bonding?
H2O
H2Se
HF
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
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
Strongest hydrogen bonding is shown by
NH3
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.
