A word that refers to an entity, location, object, occurrence, material, or quality can be countable or uncountable nouns. Uncountable nouns should only be found in the singular form. Countable nouns have both singular and plural forms. Countable nouns, as the name implies, are items that can be counted. Complete answer:
Since, Bengaluru is a proper noun, hence, it is not possible to count this word. Butter cannot be counted as it is normally an undifferentiated mass. Similarly, copper is a chemical element, so it cannot be categorized as a countable noun. Therefore, we eliminate these three words from the countable list.
Words like cousin , diary, equipment , fleet and gorilla are common nouns and they can also be counted . Hence, they are countable nouns.
Now, joy is an abstract noun, that is they are not an object and hence, we cannot count them. Wheat is not a countable noun, as it is impossible to calculate each wheat because they are really tiny in size, hence, they can be weighed but cannot be counted.
Nation and potato can be counted as they are common noun and it is possible to count them as there exists more than one potato and nation at a time.
Rahul refers to one specific person and milk is a liquid, so it is not possible to count them both. Hence, these words are eliminated.
Spacecraft can be counted but on the other hand steel and gold are chemical element . So they cannot be counted.
A plural noun denotes that there are multiple instances of that noun. Most plural forms are created by adding a -s or –es to the end of a singular word.
Hence the final list of countable nouns along with their plural forms are as follows:
The indefinite article (a or an) is hardly used for uncountable nouns, but singular verbs are used frequently. Uncountable nouns are often used in the same manner as plural countable nouns are, i.e. to refer to a single object, category, or concept.