It depends what it stands for. If it's the Prime Minister, then yes. If you mean 2 p.m., then no.
Yes, Was it a dog? Hahaha It WAS capitalized! Was can be capitalized.
Yes, "I am" is typically capitalized because "I" is a pronoun and should always be capitalized in English.
No it shouldn't be capitalized. Seasons aren't capitalized.
Yes, "Football" should be capitalized when referring to the sport in general.
Yes, "Malaysian" is capitalized when referring to the nationality or language of Malaysia.
No!
No. it's not necessary. Example: Let's have dinner at 7 p.m.
No, seasons are not capitalized.
Yes, Was it a dog? Hahaha It WAS capitalized! Was can be capitalized.
PM in time stands for "Post Meridiem" and refers to "after noon" in 12 hour clock. The "meridiem" is when the sun reaches its zenith (theortically at noon) and post means after.
Midnight to noon is 12 hours (AM), noon to midnight is another 12 hours (PM). Therefore, it is 12 hours from PM to AM.
No, it is not capitalized.
No it's not capitalized.
Wikipedia is capitalized.
No it shouldn't be capitalized.
No, keywords do not have to be capitalized.
No, "ibid" is not capitalized.