1. The bond energies of F2 Cl2 Br2 and I2 are 37 58 46 and 36kCals respectively. The strongest bond formed is in
a. F2
b. Cl2
c. Br2
d. I2
2. The percentage of ionic character of bond between two atoms is calculated from their
a. dipole moments
b. electronegativities
c. electron affinities
d. ionization energies
3. Geometry of PF5 molecule is
a. planar triangular
b. square planar
c. trigonal bipyramidal
d. tetrahedral
4 .sp3 hybridization is not important in describing the bonding in
a. NH4+
b. CCl4
c. H2O
d. AgCl
5. Greater the dipole moment
a. greater is the ionic character
b. lesser is the polarity
c. smaller is the ionic nature
d. none
6. A diatomic molecule has a dipole moment of 1.2D. If its bond distance is 1.0 A0 , What fraction of electric charge “e” exist on each atom
a. 12% e
b. 18% e
c. 25% e
d. 30% e
7. Bond angle in water is 104.5 and not 109.5 because of
a. high electronegativity of Oxygen
b. bond pair-bond pair repulsion
c. bond pair-lone pair repulsion
d. lone pair-lone pair repulsion
8. Which is not a characteristic of pie bond
a. pie bond is formed when there is always a sigma bond
b. pie bonds are formed from hybrid sp orbitals
c. pie bond maybe formed by the parallel overalapping of p-orbitals
d. pie bond results from lateral overlap of atomic orbitals
9. In the formlatio of N2+ from N2 , the electron is removed from
a. sigma star 2px orbital
b. sigma 2px orbital
c. pie 2py orbital
d. pie star 2py orbital
10. According to VSEPR, the most probable shape of the molecule having 4 electron pairs around the central atom is
a. hexagonal
b. tetrahedral
c. octahedral
d. linear
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