Dear Ruchitha, 

Congratulations on good rank. There are great chances to secure a government seat applying the reservations available. However it also depends on the course and college required. You can use the predictor app to know precise results. Here is the link for it -

https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/jee-main-rank-predictor&ved=2ahUKEwi7wbOEpYrjAhUBknAKHZ-0AesQFjAAegQIAhAB&usg=AOvVaw2QNQ0E4U1hgytKWWo9jfZm

Hope this helps. 

All the best