Alone I am 24th

Question: Alone I am 24th, with a friend I am 20. Another friend and I am unclean.What am I?

Question: What do you call a sad bird?

Question: What has a bed that you can't sleep in?

Question: How are doughnuts and golf alike?

Question: What cannot be seen or felt, but can only be broken by voice?

Question: What tastes better than it smells?