useless trivia: What Word Means: In Turkey, A Large House Used As An Official Residence?

Questions

Who carried out the first manned orbit of the earth?

What kind of boat,invented in 1898 is held clear of the water by underwater wings?

What do tha Albert Memorial and St Pancras Station have in common?

In 1984 which country wrested the Americas Cup away from United States?

Which Bach compsositions were never performed for the nobleman to whom they were dedicated?