Misc: hat age did mozart become director of concerts for the archbishop of salzburg?

Questions

In 1967 1st human heart transplant performed (Dr Christian---------- , S Africa). ?

In 1973 Pioneer 10 passes ---------- (1st fly-by of an outer planet). ?

In 1984 2,000 die from Union ---------- poison gas emission in Bhopal, India. ?

In 1793 A new war government takes office in---------- . ?

In 1947 The Bulgarian Government adopts a ---------- Constitution. ?