Question

What kind of intermolecular forces are present in ${C_2}{H_8}{O_2}$ (1-Propanol)?
A) Dipole-Dipole interactions
B) Hydrogen bonding
C) Metallic bonding
D) Both A) and B)

Answer 1

We have to remember that the hydrogen bonding is the strongest intermolecular attraction between two partial charges that further attract to a neighboring atom in a molecule. Alcohols have strong hydrogen bonding due to the presence of $OH$ Hydroxyl group.

Complete step by step answer:
We can start this question by looking at the structure which is given above, you can clearly see that $OH$ is present, that is the alcohol group, thus hydrogen bonding can be seen clearly from the structure.
Hydrogen bonding is formed between a hydrogen atom and an electronegative species when attracted to a lone pair of neighboring atoms in a molecule. When an attractive force is present between an electronegative atom such as $O,F,N$ or more and Hydrogen atom it will lead to the formation of this type of bonding.
Whereas,
Dipole is nothing but magnetized poles separated by a charge. In Hydrogen bonding an electronegative atom always has a partial negative charge and Hydrogen being a proton carries positive charge.

Option A) this option can be right as in this molecule dipole-dipole interactions are available, but we have other options too so before answering we must look at all the other options too.
Option B) This option can be right as in this molecule hydrogen bonding is available, but we have other options too so before answering we must look at all the other options too.
Option C) this is an incorrect option as it is not a metal to have metallic bonding.
Option D) since solving the question earlier, we conclude that option A ) and Option B) can be right, but looking at the other options available which have both A) and B) as an answer can be the correct option for this question.

Hence, the correct answer is Option D.

Note: Before answering the question one must look at all the options given for a particular question because sometimes in hurry and over confidence we can choose wrong options, so to avoid these types of mistakes one must not try this practice.