Question

1. Which of the following molecules does not form hydrogen bonds with water? Explain.
CH3COOH
C2H5CHO
HCOOH
HF

2. Which of the following statements is not true with regards to interaction between hydrogen peroxide, H2O2, and methanol,CH3OH? Explain.

H2O2 and CH3OH will exert dispersion forces between each other
H202 and CH3OH will exert dipolar forces between each other
H202 and CH3OH will exert ion-dipole forces between each other
H202 and CH3OH will exert hydrogen bonded forces betweeen each other

3. A compound Y has a melting point of -80C and a boiling point of 50C. At what temperature is Y a has? Explain.

100C
-100C
40C
-40C

4. What type of intermolecular forces exist between Cl2 and Mg2+? Explain.
London dispersion
London dispersion and ion-dipole
London dispersion and ion-induced dipole
dipole-dipole

Answer 1

1)

for hydrogen bond to be formed, there must be H attached to either of N, O or F

In C2H5CHO, O is double bonded to C and there is no H attached to O. So, it will not form hydrogen bonding.

Answer: C2H5CHO

2)

There is no ion.

So, there can’t be ion-dipole force.

Answer: H202 and CH3OH will exert ion-dipole forces between each other

Both of them are polar. So, there will be dipolar forces.

Dispersion force acts in all molecules.

Both of Hydrogen atom attached to Oxygen. So, both form hydrogen bonding

Only 1 question at a time please