Identify the intermolecular forces present in each of these substances... HCl, He, CO, HF


#1

Identify the intermolecular forces present in each of these substances… HCl, He, CO, HF Match these to the correct groups below

1. Hydrogen bonding, dipole-dipole and dispersion
2. Dipole-dipole and dispersion only
3. Dispersion only

Concepts and reason
The forces of attraction present in between the molecules or atoms or compounds is termed as intermolecular forces. In the given question, different molecules and atoms are mentioned and you must find the correct interactions present in them.

Fundamentals
The dipole-dipole interactions are present in polar molecules due to opposite charge attractions. These are strong forces due to attraction between opposite charges.
Dispersion forces are the weakest forces which are present in between all molecules or atoms.
Hydrogen bonds are present in molecules having at least one H-A bond where A is the strong electronegative atom (mainly F, Cl and N).

Answer:

He interactions present in HCI are hydrogen bonding, dipole-dipole interactions and dispersion forces.

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The molecule HCI is composed of hydrogen and chlorine atom. There is high difference in electronegativities therefore, it is polar in nature. It also has hydrogen bonding and dispersion forces.

Check the polarity and hydrogen bonding for the molecule carefully.

The interactions present in He is dispersion forces.
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The atom He is having dispersion forces only.

The interactions present in CO are dipole-dipole interactions and dispersion forces.
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The molecule Co is composed of carbon and oxygen atom. There is high difference in electronegativities therefore, it is polar in nature. It also has dispersion forces.

Check the polarity and hydrogen bonding for the molecule carefully.

The interactions present in HF are hydrogen bonding, dipole-dipole interactions and dispersion forces.
image

The molecule HF is composed of hydrogen and fluorine atom. There is high difference in electronegativities therefore, it is polar in nature. It also has hydrogen bonding and dispersion forces.

Check the polarity and hydrogen bonding for the molecule carefully.