Some of these pictures and descriptions may give away plot details that you might not want to know before watching the film.
This is a classic of Hindi cinema, and one that doesn't have any Bollywood singing and dancing. It's a social drama about a rich landlord's son, Surya, (Anant Nag) who takes advantage of his beautiful but poor lower caste servant woman, Laxmi, whose husband left her alone (starring Shabana Azmi in her first movie which helped to make her a major actor in the Indian New Wave of the 1970s and 1980s.)
In the snake scene, Surya is leaning his arm on a pipe, watching some women fill their pots with water at a spring when he sees a cobra crawling on the pipe towards him. He cries to Laxmi for help. Laxmi grabs a branch and pokes it at the cobra until the snake crawls away. This shows how helpless the spoiled city boy is and how much he needs the country girl Laxmi's help. But he abandons her later when she's pregnant with his child and an embarrasment to his reputation, and turns to violence against her returned husband, showing clearly the inequities of the social structure where the rich can abuse the poor with impunity. The movie ends with a young boy's rebellious act against the landowner, but it is only a symbolic one.