Identify the hidden meaning behind this picture?

What is the longest word in the dictionary?

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?