Misc: What is the official language of india?

Questions

In 1853 Hendrik Antoon---------- , Dutch physicist (Nobel 1902) ?

In 1872 Britain introduced the concept of voting by ---------- ballot. ?

In 1936 Spanish Civil War began as Gen. Francisco ---------- led uprising. ?

In 1949 Hunter S. Thompson, ---------- journalist born?

In 1955 First electric power generated from ---------- sold commercially. ?