Misc: What East Anglian town is at Britain's most extreme eastern point?

Questions

Charles Best & Frederick Banting discovered this live saving drug in 1922?

Charles Lindbergh took how many sandwiches with him on his famous transatlantic flight?

Chemical compound of hydrogen & oxygen with the formula h2o2?

Chemical compound that has the formula nacl?

Chemical compounds or mixtures that undergo rapid burning or decomposition with the generation of large amounts of gas & heat & the consequent production of sudden pressure effects?