Are Nonpolar Molecules Hydrophobic or Hydrophilic? Are NH3 & CO2 Polar or Non Polar?

Are Nonpolar Molecules Hydrophobic or Hydrophilic? Are NH3 & CO2 Polar or Non Polar?

Are Nonpolar Molecules Hydrophobic or Hydrophilic? Are NH3 & CO2 Polar or Non Polar?

Molecules such as oil and petrol are nonpolar in chemistry. There is a force between nonpolar molecules that is very weak and gets attracted to each other. The power is known as Van der Waals force. It is why nonpolar molecules such as oil are hydrophobic. In other words, we can say the nonpolar molecules repel water because it is hydrophobic.

Now we will discuss what nonpolar molecules are, and then we will explain to you about hydrophobic molecules to understand that nonpolar substances are hydrophobic.

There are two main classes of molecules in the world. One is called a polar molecule, and the second is a nonpolar molecule. Some other molecules are between the polar and nonpolar molecules. Now we will discuss the opposite and nonpolar molecules, their definition, characteristics, and examples in detail.

What are Polar molecules?

In both molecules, you have to remember that there will be a covalent bond. In a polar bond, the electrons cannot share equal distribution. Here will be the formation of dipole forms, there will be a slight positive molecule, and the other contains a small negative charge. We have discussed this concept already in the previous article.

Examples of the polar molecules:

  • Water
  • Ethanol
  • Hydrogen sulfide
  • Ammonia

What are nonpolar molecules?

In polar and nonpolar bonds, there is a covalent bond formation. Here the electrons are divided equivalent to no electrical charge difference between them. In simple words, we can understand that nonpolar molecules are similar, and there is no difference in electronegativity. We will discuss in general terms that if the electronegativity value is less than 0.5, then the molecule will be considered nonpolar. The essential point of nonpolar is that it can form by identical molecules. It cannot develop by different molecules because there will be a difference in electronegativity. 

Examples of nonpolar molecules:

  • Benzene
  • Methane
  • Carbon dioxide
  • Ethylene

Difference between Hydrophilic and Hydrophobic

If we learn about hydro, then it means water. In simple words, we can understand that hydrophilic and hydrophobic are concerned with the property of water. Now understand the meaning of phobia. The term phobia means fear from water. 

Now we can easily understand the definition of hydrophilic and hydrophilic and the terms in chemistry to understand the molecules better.

According to the chemistry of hydrophilics, it means that these are the molecules that love water, or we can say that they can mix with water. In contrast, hydrophobic molecules are those molecules that fear water, or we can say that they cannot mix with water. Hydrophilic is water’s attraction, and hydrophobic is the repulsion of water.

 Are NH3 & CO2 polar or nonpolar in chemistry?

Ammonia is a colorless gas. It helps in the fertilization and cleaning of many chemicals. Have you ever thought that ammonia is a polar and nonpolar molecule? The answer is that ammonia is the opposite due to its bonding. It contains one nitrogen and three hydrogens in it. One thing important in ammonia is that nitrogen makes it more electronegative than hydrogen in its compound.

Suppose you want to know the polarity of ammonia. In that case, you can understand how molecule polarity can decide its electronegativity, the shape of the molecule, and one thing more than the types of atoms also affect the molecule’s polarity.

What do you mean by the polarity of the molecule?

We, daily, discuss polarity words in our life—the word polarity used for directions such as the North Pole and the South Pole of the earth. One thing more about the directions is that the North Pole and the South Pole are present on the opposite side of the planet; it is opposite to one another. For example, if you use any battery or check the battery, there are also two poles. One mole is on the positive side, and the second is on the negative side.

In the same way, atoms also have polarity between them; this type of polarity helps them attract each other. We could call a molecule a polar if one end of the molecule arranges to contain a positive terminal. On the other hand, the molecule comprises a negative terminal opposite each other.

There is a highly positive atom in polar molecules, and the second is a highly negative molecule. If the atoms fuse, they will form electrical poles to each other. There will be an electronegative difference between both poles. One is more electronegative, and the other is not more electronegative. Water is the most commonly known example of polar molecules in the world, and it has polar nature, which means that it bonds with many other molecules. Due to its core, it provides the basis of our life. 

Carbon dioxide is nonpolar due to its structure (linear). Carbon dioxide contains one carbon atom and two oxygen atoms. Here is the equal electronegativity value between them. One side of the carbon is attracted while two oxygen is similar to the other side, but both sides have an equally electronegative value. Here is no unequal sharing of the electrons in the molecules so that the molecules will be nonpolar.

The molecules that do not contain positive and negative sides are called nonpolar. 

Why is carbon dioxide nonpolar in nature?

If we look at the chemistry of any molecule, we have to study the molecule’s bond. If any molecule contains more than one bond, we have to consider all bonds of the molecules, so let us first examine the structure of carbon dioxide.

We know that carbon bonds with oxygen, and there is a double bond structure. Here are two double bonds in the form of carbon dioxide. We all know that oxygen is a more electronegative molecule than carbon. So more electrons will move towards oxygen atoms than carbon because it is more electronegative in chemistry.

In simple words, there is not any shifting of any molecule to any pole, so carbon dioxide is nonpolar.


The nonpolar molecules are hydrophobic. It means nonpolar molecules do not like water molecules. NH3 is a polar molecule, while CO2 is nonpolar. In polar molecules, the numbers of electrons are not equally divided. In nonpolar molecules, the number of electrons in the nonpolar electrons is equal.