Denmark is a country IN the north of Europe.
Correct!
The Nile is the longest river ON the planet.
Correct!
The largest hot dog ON the world weights 3.18kg.
Incorrect!
The drugstore is IN the left of the street.
Incorrect!
I'm just watching some videos IN Youtube.
Incorrect!
Ipanema is a famous neighborhood IN Rio de Janeiro
Correct!
Brazil declared independence ON September 7, 1822.
Correct!
I always watch a film ON Sundays.
Correct!
Brazil declared independence ON 1822.
Incorrect!
My birthday is IN November.
Correct!