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Which of the following molecules has zero dipole moment
BF3
NH3
CHCI3
H2O
Which of the hydrogen halides has the highest percentage of ionic character
HBr
HCI
HI
HF
Which of the following molecules has a co-ordinate covalent bond
HCI
NH4CI
NaCI
AICI3
Fluorine molecule (F2) is formed by the overlap of
s – s orbital
p – p head on overlapping of orbitals
p – p parallel overlapping of orbitals
s – p orbital
The shielding effect of the inner electrons is responsible for
Increasing electron affinity
Increasing electonegativity
Increasing ionization energy values
Decreasing ionization energy values
An ionic compound A+B–is most likely to be formed when
Both the ionization energy of A and electron affinity of B are high
The ionization energy of A is low and electron affinity of B is high
The ionization energy of A is high and electron affinity of B is low
Both the ionization energy of A and electron affinity of B are low
The shape of H3O is
Trigonal planer
Angular
Pyramidaj
Tetrahedral
Which of the following statements is not correct regarding bonding molecular orbitals
Bonding molecular orbitals have low electron density between the two nuclei
Bonding molecular orbitals possess less energy than atomic orbitals from which they are formed
Bonding molecular orbitals are formed when the electron waves undergo constructive interference
Every electron in the bonding molecular orbitals contributes to the attraction between atoms
Those elements whose electronegativities are 1.2 and 3.2, react to form
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