What is round in the middle and high on both ends

Question: I'm round at the ends and high in the middle.What am I?

Question: What is that thing we buy for eating but cannot eat it?

Question: What sound does a nut make when it sneezes?

Question: Look at my face, I am somebody. look at my back, i am nobody. What am I?

Question: I have 6 faces and 21 eyes, but can't see a thing. What am I?

Question: What tastes better than it smells?