Question

Pick out the nouns in the following sentences. State whether they are common,proper, collective, material or abstract noun 1) Delhi is the capital of India

Answer 1

Delhi and India are the nouns
both are Proper noun as they are the proper name of some special place. 

Answer 2

'Delhi' and 'India' are proper nouns. As per the definition of 'proper noun', they are the names of particular person place or a thing. They also start with the Capital letter.

'capital' is common noun. As per the definition of 'common noun', it refers to an object or a thing but is not the name of a particular person, place or a thing.