Yes, Styrofoam is a proper noun, a trademarked product of the Dow Chemical Company.
However, the word often appears in lowercase in reputable professional publications for any similar product.
A similar usage change occurred with the word mayonniase, which is no longer a proper noun.
"Park Avenue" is a proper noun, because it is a place. Proper nouns like this should always be capitalized.
Exxon is a proper noun
Yes, the word 'Ali' is a proper noun, the name of a person.A proper noun is the name or title of a specific person, place, or thing.A proper noun is always capitalized.
Proper noun
It is a proper noun, because it is the name of a specific thing.
The noun 'Styrofoam' is an uncountable noun as a word for a substance.Some uncountable nouns for substances use a plural form exclusively for 'types of' or 'kinds of''. However, I don't know if there is more than one kind of Styrofoam.
"Park Avenue" is a proper noun, because it is a place. Proper nouns like this should always be capitalized.
Pencil proper or common noun
proper noun
Exxon is a proper noun
Yes, the word 'Ali' is a proper noun, the name of a person.A proper noun is the name or title of a specific person, place, or thing.A proper noun is always capitalized.
proper noun
Proper noun
It is a proper noun, because it is the name of a specific thing.
what is trix
Proper noun or common noun
it's a common noun. a proper noun would be Spider-Man.