useless trivia: What Word Means: A First Name - A River In Scotland?

Questions

In 1925 Chinese revolutionary leader Sun ---------- died.?

In 1925 First ---------- radio broadcast.?

In 1927 Raul---------- , President of Argentina, born.?

In 1930 Mohandas Gandhi began ---------- -mile march protesting British salt tax.?

In 1936 FDR conducts his first "---------- Chat".?