Question

Identify the strongest attractive force present in the pure substances shown: London forces, dipole-dipole, hydrogen bonding, ion-dipole, or ionic attractions.

1. CH₃OH

2. LiBr

3. CH₃F

4. CH₃CH₂CH₃

Answer 1

Sol :-

London forces :- The are the forces which are present between the two or more non-polar molecules.

Dipole-dipole forces :- These are the forces which are present between the two or more polar molecules.

Hydrogen bonding :- These are the forces which are present between the two or more polar molecules which contains at least one H-F or H-O or H-N bond.

Ion-dipole forces :- These are the forces which are present between an ion and a polar molecule.

Ionic attraction :- These are the forces which are formed between two charged particles that is cation and anion.

So,

1. CH3OH form Hydrogen bonding because it is a polar molecule which contains H and O atoms.

2. LiBr form Ionic attraction because it is a ionic compound which contains Li+ cation and Br- anion.

3. CH3F form Dipole-dipole forces because it is a polar molecule which do not contains H-F or H-O or H-N bond.

4. CH3CH2CH3 form London forces because it is a non-polar molcele.