Just some questions

I'm back! Some more GK questions:-

1. Where will the 2016 Olympics be held?
2. Which actress was married to the Prince of Monaco?
3. Which film's protagonist was 'Eliza Doolittle'?
4. With which event would we associate the 'Queen's Baton'?
5. What is the longest word in the dictionary?

Answers: Rio De Janeiro, Brazil. , Grace Kelly, My Fair Lady, Commonwealth Games, pneumonoultramicroscopicsilicovolcanoconiosis-a lung disease!!