Question

Naphthalene dissolves in kerosene because naphthalene and kerosene are ________ respectively.
A.polar and nonpolar
B.polar and polar
C.non-polar and nonpolar
D.nonpolar and polar

Answer 1

Hint:Naphthalene which is also known as Bicyclo-deca-1,3,5,7,9-pentaene. Kerosene is a combustible hydrocarbon derived from petroleum. Kerosene is pale yellow or colourless and has a not-unpleasant characteristic odour.

Complete answer:
Dissolving is also known as dissolution. Dissolving is passing of solute through a solution. A mixture of two or more substances where one or more solutes are dissolved uniformly in a solvent is known as solution. A solution is a homogeneous mixture. The substance which gets dissolved in a solvent is known as a solute. A liquid that can dissolve a substance or a solute in it, is known as a solvent.
The substances which possess the ability to get dissolved in a particular solvent are known as soluble substances with respect to that solvent. The substances which do not possess the ability to get dissolved in a particular solvent are known as insoluble substances with respect to that solvent.
Here naphthalene is a solute which is being added to a solvent that is kerosene.
Polar solutes dissolve in polar solvent. Like salt dissolves in water where both are polar substances. Non polar substances don’t dissolve in polar solvent. But nonpolar substances dissolve in nonpolar solvents like naphthalene and kerosene.
Therefore, we can say that naphthalene dissolves in kerosene because both naphthalene and kerosene are non polar substances.

Therefore, the correct option is C.

Note:
Uses of naphthalene are as follows,
-It is an aromatic hydrocarbon found in coal tar or crude oil.
-It is used in manufacturing plastics.
-It is used in manufacturing of resins.
-It is used in the manufacturing of fuels.
-It is used in manufacturing of dyes.
-It is used as a fumigant insecticide.
Uses of kerosene are as follows,
-It is used as a fuel in kerosene lamps.
-Kerosene is also used as a component in jet engines.
-It is also used as a solvent for greases and insecticides.