"Acid" can function as a noun or an adjective.
the tail ( carbon hydrogen only part) the COOH part that makes it an acid does engage in hydrogen bonding.
Noun.
Laboratory is a noun.
noun
Corrosion is a noun.
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "lecturer" is a noun.
The part of speech for "indefinite" is an adjective.
The part of speech for "buried" is a verb.