21342.If the bond length and dipole moment of a diatomic molecule are 1.25 Å and 1.0 D respectively, what is the percent ionic character of the bond?
10.66
12.33
16.66
19.33
21345.The bond angle in NF3 (102.3°) is smaller than NH3 (107.2°). This is because of
large size of F compared to H
large size of N compared to F
opposite polarity of N in the two molecules
small size of H compared to N
21347.Among the following the maximum covalent character is shown by the compound
MgCl2
FeCl2
SnCl2
AlCl3
21350.The correct arrangement of the species in the decreasing order of the bond length between carbon and oxygen in them is
CO, CO2, HCO–
2, CO–2
3
2, CO–2
3
Ca+2, K+, S–2
CO–2
3, HCO–
2, CO2, CO
3, HCO–
2, CO2, CO
CO, CO–2
3, CO2, CHO–
2
3, CO2, CHO–
2
21351.Identify the incorrect statement, regarding the molecule XeO4:
XeO4 molecule is tetrahedral
XeO4 molecule is square planar
There are four pπ-dπ bonds
There are four sp3 – p, σ bonds
21352.Using MO theory predict which of the following species has the shortest bond length?
O+
2
2
O–
2
2
O2–
2
2
O2+
2
2
21354.Which one of the following constitutes a group of the isoelectronic species?
CO2–
2, O–
2, CO, NO
2, O–
2, CO, NO
NO+, C2–
2, CN–, N2
2, CN–, N2
CN–, N2, O2–
2, C2–
2
2, C2–
2
N2, O–
2, NO+, CO
2, NO+, CO
21356.Which one of the following pairs of species have the same bond order?
CN– and NO+
CN– and CN+
O–
2 and CN–
2 and CN–
NO+ and CN+
21357.For a stable molecule the value of bond order must be
negative
positive
zero
there is no relationship between stability and bond order
21359.Dipole-induced dipole interactions are present in which of the following pairs?
H2O and alcohol
Cl2 and CCl4
HCl and He atoms
SiF4 and He atoms