When was Mozart's first work done?

Answer 1

When he was 4 years old.

At the age of 5 years, Mozart could both read and write musical scores.
He wrote his first piece of music when he was 5 it was twinkle twinkle little star

Mozart did not compose the tune, Twinkle twinkle little star.

Answer 2

Mozart composed the Concerto for Clarinet and Piano, K.622, in 1791.

He wrote it specifically for the Basset Clarinet, though the sheet music is now available for both Bb and standard A clarinet.

Answer 3

Mozart composed hundreds of movements which were marked 'Allegro'. Which particular one do you mean?

Answer 4

Mozart was composing from 1764 to his death in 1791.

Answer 5

Wrote his first work around 1759-1760