What are the matters related to the "Day of Reckoning" and its torment, and what are the questions that will be asked therein?

On the Day of Judgment, a person will be held accountable for every deed he performed, whether good or evil. The first questions he will be asked in the grave are: Who is your Lord? What is your religion? And who is this man who was sent among you? Then, on the Day of Judgment, the first thing a person will be held accountable for is prayer. If it was complete, it will be recorded as complete for him. If there was any deficiency in it, it will be completed from voluntary prayers, and then all other deeds will be taken into account accordingly. A person will also be asked about his life and youth—how he spent them; about his wealth—from where he acquired it and how he spent it; and what he did with what he knew. Nations will be asked: What was your response to the messengers?