The difference between Biphenyl and naphthalene is that Biphenyl is two phenyl groups linked by a single bond from a carbon on one phenyl group to another. Naphthalene shares two carbon atoms in between two phenyl groups.
Both are bicyclic aromatic solid compounds insoluble in water
The picrate test is used to distinguish between anthracene and naphthalene. When naphthalene is treated with picric acid, a yellow precipitate is formed due to the formation of naphthalene picrate. In contrast, when anthracene is treated with picric acid, an orange or red precipitate is formed due to the formation of anthracene picrate. This color difference can be used to differentiate between the two compounds.
The chemical formula for biphenyl is C12H10
biphenyl is soluble in ethanol and also in most of organic solvents
4-acetyl biphenyl
A biphenyl is a substituted or otherwise altered version of the hydrocarbon C12H10, such as PCBs.
the melting point of biphenyl is 70 degrees Celsius.
Sublimation can be used to separate naphthalene from chalk powder. Naphthalene sublimes at room temperature, while chalk powder does not, allowing for the separation based on this difference in physical properties.
Paradichlorobenzene dissolves in naphthalene because they are both nonpolar compounds. Nonpolar substances are soluble in nonpolar solvents like naphthalene due to similar attractive forces between molecules, known as London dispersion forces. This allows paradichlorobenzene to mix and dissolve evenly in naphthalene.
NaI has ions and has strong electrostatic force of attraction, hence high melting point. Naphthalene has weak van der Waals forces of attraction between the molecules and hence have low melting point.
Naphthalene would be most soluble in non-polar solvents such as benzene or hexane because it is a non-polar molecule. Polar solvents like water would not dissolve naphthalene well due to the lack of strong intermolecular interactions between the polar water molecules and the non-polar naphthalene molecules.
For a simple experiment to distinguish between pure and impure naphthalene, you can try sublimation. Place a small amount of naphthalene in a test tube and heat it gently. If the naphthalene sublimes (converts from solid to gas without melting), leaving no residue, it is likely pure. However, if there is residue left behind, it suggests the naphthalene is impure.