Yes, in the game of chess, one king can check another king.
Yes, in the game of chess, a king can put another king in check.
No, you cannot put a king in check with another king in a game of chess.
Yes.
No, you cannot check a king with a king in a game of chess.
The objective of chess is to checkmate the king, where the king is in check by a piece and it cannot block the check, move to another square, or capture the piece checking the king.
No, it is not possible to move a king next to another king in a game of chess because it would put the king in check, which is not allowed according to the rules of the game.
No, in a game of chess, a king cannot checkmate another king.
No, in a game of chess, a king cannot take another king.
No, you cannot capture a king with another king in a game of chess.
No, you cannot castle in chess if your king is currently in check.
No, you cannot castle when your king is in check in chess.