No, except at the beginning of a sentence because it is not a proper noun.
Actually yes. As Champagne is a recognised appellation for wine it is a proper noun for both the region and the wines.
Yes.
Yes, "Champagne" should always be capitalized because it refers to the specific type of sparkling wine that comes from the Champagne region of France.
Yes, "I am" is typically capitalized because "I" is a pronoun and should always be capitalized in English.
Yes, the word "Tuesday" is always capitalized because it is a specific day of the week.
Yes, when referring to the title of the President of the United States, it should always be capitalized.
No, circa does not need to be capitalized.
Yes, it should always be capitalized.
No, the word "rif" is not always capitalized. It should only be capitalized if it is part of a proper noun or at the beginning of a sentence.
Yes it should always be capitalized.
A common noun is capitalized only when it is the first word in a sentence. A proper noun is always capitalized. An acronym is always capitalized.
No, CRNA does not always need to be capitalized. It should be capitalized when using it as an acronym for Certified Registered Nurse Anesthetist.
Yes, both Hindu and Hinduism should always be capitalized.
All titles will always be capitalized.