21362.Which one of the following pairs of molecules will have permanent dipole moments for both members?
SiF4 and NO2
NO2 and CO2
NO2 and O3
SiF4 and CO2
21363.According to MO Theory,
O+
2 is paramagnetic and bond order is greater than O2
2 is paramagnetic and bond order is greater than O2
O+
2 is paramagnetic and bond order less than O2
2 is paramagnetic and bond order less than O2
O+
2 is diamagnetic and bond order is less than O2
2 is diamagnetic and bond order is less than O2
O+
2 is diamagnetic and bond order is more than O2
2 is diamagnetic and bond order is more than O2
21368.
(I) 1, 2-dihydroxy benzene
(II) 1, 3-dihydroxy benzene
(III) 1, 4-dihydroxy benzene
(IV) Hydroxy benzene
The increasing order of boiling points of above-mentioned alcohols is
(I) 1, 2-dihydroxy benzene
(II) 1, 3-dihydroxy benzene
(III) 1, 4-dihydroxy benzene
(IV) Hydroxy benzene
The increasing order of boiling points of above-mentioned alcohols is
I < II < III < IV
I < II < IV < III
IV < I < II < III
IV < II < I < III
21370.Which one of the following does not have sp2 hybridised carbon?
Acetone
Acetic acid
Acetonitrile
Acetamide
21371.The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizing order of the polarizing power of the cationic species, K+, Ca2+, Mg2+, Be2+?
Mg2+, Be2+, K+, Ca2+
Be2+, K+, Ca2+, Mg2+
K+, Ca2+, Mg2+, Be2+
Ca2+, Mg2+, Be2+, K+
21372.Which one of the following conversions involve change in both hybridization and shape?
NH3 → NH+
4
4
CH4 → C2H6
H2O → H3O+
BF3 → BF–
4
4
21373.Among the following mixtures, dipole-dipole as the major interaction, is present in
benzene and ethanol
acetonitrile and acetone
KCl and water
benzene and carbon tetrachloride
21375.A molecule (X) has
(i) four sigma bonds formed by the overlap of sp2 and s orbital
(ii) one sigma bond formed by sp2 and sp2 orbitals and
(iii) one π bonds is formed by Px and Px orbitals
Which of the following is X?
(i) four sigma bonds formed by the overlap of sp2 and s orbital
(ii) one sigma bond formed by sp2 and sp2 orbitals and
(iii) one π bonds is formed by Px and Px orbitals
Which of the following is X?
C2H6
C2H3Cl
C2H2Cl2
C2H4
21376.Which of the following contains maximum number of lone pairs on the central atom?
ClO–
3
3
XeF4
SF4
I–
3
3
21377.Malleability and ductility of metals can be accounted due to
the presence of electrostatic force
the crystalline structure in metal
the capacity of layers of metal ions to slide over the other
the interaction of electrons with metal ions in the lattice
21378.Lattice energy of an ionic compound depends upon
Size of the ion only
Charge on the ion only
Charge on the ion and size of the ion
Packing of ions only
21379.The bond length of HCl molecule is 1.275 Å and its dipole moment is 1.03 D. The ionic character of the molecule (in percent)(charge of electron 4.8 × 10–10 esu) is
100
67.3
33.6
16.83