By which act untouchability was ended?

Untouchability was formally abolished in India by the Constitution of India, which came into effect on January 26, 1950. Article 17 of the Constitution specifically prohibits the practice of untouchability and mandates its punishment in accordance with the law. This was a significant step towards promoting equality and social justice in the country. Additionally, the Untouchability (Offences) Act was enacted in 1955 to provide legal measures against the practice.