Question

Hydrogen bonds can be found between molecules of which of the following
substances?

A) H2
B) CH4
C) NH3
D) HI

Answer 1

Answer:

The presence of hydrogen bonding between molecules of a substance indicates that the molecules are polar. This means the molecules will be soluble in a polar solvent such as water. Some examples of polar molecules which can hydrogen bond are ammonia ( NH3 ) and methanol ( CH3OH ).

I think the answer should be C

Answer 2

Taking into account the definition of hydrogen bond, the correct answer is option C): Hydrogen bonds can be found between molecules of NH₃

• Dipole - dipole forces

The dipole-dipole forces are forces of attraction between polar molecules. These molecules attract when the positive end of one of them is close to the negative of the other.

• Hydrogen bonds

Hydrogen bonds are a type of dipole-dipole force. In this interaction, a molecule that presents hydrogen interacts with another that presents an atom with high electronegativity, such as oxygen, fluorine or nitrogen (O, F, N). In this way, between the hydrogen, which has a low electronegativity and the electronegative atom, an interaction is established, due to their opposite charges.

• Ammonia

Ammonia NH₃ is the compound with hydrogen bond, since hydrogen, when joining a very electronegative atom with a small atomic radius such as nitrogen N, supports a positive partial charge that is electrostatically attracted by the negative partial charge of nitrogen. another neighboring molecule. This bond between molecules is the hydrogen bond. The hydrogen bonding is also influenced by the pair of free electrons in nitrogen, which complements the effect of the difference in electronegativity between the atoms.

• Correct answer

In summary, the correct answer is option C): Hydrogen bonds can be found between molecules of NH₃

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