Question

Molecular models of two different substances are shown below. In the
molecule on the left, the oxygen atom pulls on electrons more strongly than
the hydrogen atoms. In the molecule on the right, the two oxygen atoms pull
on the shared electrons with the same strength.
Water molecule, H,O Oxygen molecule, Oz
When the two substances are put in the same container, they do not attract
each other. Why does this happen?
A. They both contain oxygen.
B. One is polar and one is nonpolar.
C . They are both polar.
D. They contain different elements.

Answer 1

The answer would be B.

H2O is polar and forms hydrogen bonds with itself but O2 is nonpolar and can only form weak(van der waals) interactions.

Answer 2

Answer: Option B

Explanation:

The molecules that is described in the model is water $H_{2}O$ and other molecule is $O_{2}$ molecule.

Due to difference in electronegativity of hydrogen atom and oxygen atom there is partial positive charge on each hydrogen atom and partial negative charge on oxygen atom of $O_{2}$ molecule.

Hence, water is a polar molecule.

Whereas in $O_{2}$, there is covalent bonding due to sharing of electrons. Hence, this molecule is covalend and hence, it is neutral in nature.

Therefore,  $O_{2}$ is a non-polar molecule.

So, both the molecules are put together in the container then there will be no attraction in between them because water molecules contains charge but oxygen molecules does not contain any charge as they are neutral.

Thus, we can conclude that one molecule is polar and other is non polar so they do not attract each other.