Which statement is true about oh− ?

it is a polyatomic anion because it has more than one atom and a negative charge.

it is a polyatomic anion because it has more than one atom and a positive charge.

it is a polyatomic cation because it has more than one atom and a negative charge.

it is a polyatomic cation because it has more than one atom and a positive charge.

Im gonna say A. because anions are negative atoms. OH- is negative, you can tell because of the negative sign. (If it was positive it would be a cation.)

Hope this helps :)

The correct answer is the option A: It is a polyatomic anion because it has more than one atom and a negative charge.

Explanation:

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As we can see the OH- ion, it has a negative charge so we say it is an anion.

When the ion has a positive charge, it is called cation.

We also see that it is polyatomic because it has more than one atom.

When it has only one atom, it is called monoatomic.

After the analysis we conclude that the correct answer is the option A: It is a polyatomic anion because it has more than one atom and a negative charge.

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.