Yes it is. Urdu belongs to the Indo-Aryan branch of Indo-European languages.
The Indo-European language branch with the most speakers is the Indo-Iranian branch, which includes languages such as Hindi, Urdu, Bengali, Punjabi, and Persian.
No. Urdu is the Pakistani name for the language known in India as Hindustani. It uses the Persian-Arabic script, but is actually an Indo-European language (like Persian and practically all of the European languages).
The language that is not an Indo-European language is Japanese.
Yes, Armenian is an Indo-European language.
Yes, Russian is an Indo-European language.
Yes, Hindi is an Indo-European language. It belongs to the Indo-Iranian branch of the Indo-European language family and is spoken by a large population primarily in India.
Yes, Russian is an Indo-European language belonging to the Slavic family.
Yes, Russian is an Indo-European language. It belongs to the East Slavic branch of the Indo-European language family.
There is no Proto-Indo-European language group. Proto-Indo-European, or PIE, is the hypothetical root language from which Indo-European languages today (and others that are extinct) descend.
No, Arabic is not an Indo-European language. It belongs to the Semitic language family.
The language that is not classified as an Indo-European language is Japanese.
The oldest known Indo-European language is believed to be Proto-Indo-European, which is the hypothetical common ancestor of all Indo-European languages.