Question

why has constitution made untouchability a punishable offence

Answer 1

it is because we can't partialitate others as untouchables they are also humans

Answer 2

IT IS MADR UNTOUCHBILITY A PUNISHIBLE OFFENCE BECAUSE ,THE CONSTITUTION WANTS TO PRROVE THAT EVERYONE ARE EQUALLY TREATED IN INDIA AND ALSO NO BODY CAN BE DOMINATED BY ANY PERSON.
IT ALSO TELLS THAT NO BODY IS NEITGER HIGH NOR LOW .