Nothing happens, when the king reaches the other end of the board he reaches the other end of the board, that's it.
Nothing happens. Only pawns accomplish anything by reaching the other side of the board.
Reaching the end of the chess-board is only significant to the pawn who then can be promoted to any chess piece other than the King .
No. When a pawn reaches the 8th rank, it can be promoted into other pieces, so you can get a Queen back there. But that applies to pawns only. Nothing happens if a Bishop or other piece reaches the 8th rank.
The pawn , upon reaching the other side , may then be promoted to any chess piece other than the King .
Nothing special. More than likely the king will take the pawn.
Yes , a pawn recently promoted to Queen is subject to immediate attack or capture as any other chess piece is open to capture/attack .
It becomes a queen
The pawn , which can be promoted to any other chess piece besides the King , when promoted will still occupy the same square .