useless trivia: What Word Means: Shrubs Or Trees Of The Genus Alnus?

Questions

Which 20th novel, made into a film, concerns the friendship of a teacher called Fielding and a doctor called Aziz?

Which process invented in 1855 converts pig iron into steel?

HISTORY; Which British pianist initiated lunchtime concerts at the National Gallery during wwii?

Bummalo fish dried and salted is eaten as a relish called what?

What do we call Rossinis opera La Gazza Ladra?