Chemical Bonding

The origin of intermolecular forces is because of
> attraction between polar molecules.
> forces between permanent dipole and induced dipole.
> dispersion forces due to distortion of electron clouds under the influences of nucleus of atoms.
H2O exists in liquid state whereas H2S in gaseous state because hydrogen bond exists in water and does not exist in H2S.
The dipole moment helps to predict whether a molecule is polar or non-polar.
Alcohol is polar solvent.
Ionic compounds are insoluble in non-polar solvents.
The bond which is present in water molecules is hydrogen bond.
The octet rule is not valid for BF3 molecule.
The type of bonds present in CuSO4.5H2O are electrovalent bond, covalent bond, coordinate bond and hydrogen bond.
The number of valence electrons in the O2- is 8.
In the covalent bond, electrons are equally shared by participating atoms.
An atom of sodium loses one electron and chlorine atom accepts one electron. This results int the formation of sodium chloride molecule. This type of molecule will be electrovalent.
The four bonds of CCl4 are directed in space at an angle of 109O5'.
Pi bond is weaker than a sigma bond.
Triple bond is stronger than a double bond.
Co-ordinate covalent bond is weaker than a covalent bond.
Lattice energy depends on the size of the ions and their charge.
Ionic compounds are insoluble in alcohol.
Ionic compounds in the solid state are bad conductors of electricity.
NaOH contains both ionic bond and covalent bond.
Ionic bond comes into existence by the transference of electrons between the participating atoms.
The atom losing electron changes into cation while the other atom gaining electron is converted into anion.
Examples of ionic bonds are NaCl, KCl, MgF2, CaCl2.
Geometrical shape of water molecule is angular.
Geometrical shape of ammonia molecule is pyramid.
Geometrical shape of carbon dioxide is linear.
Geometrical shape of methane is tetrahedral.
A metallic bond is electrostatic in nature.

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