Important General Knowledge Facts about the Indian States Most densely populated state - Bihar The least densely populated state - Arunachal Pradesh The first state to be formed on a linguistic basis - Andhra Pradesh Most literate state - Kerala Least literate state - Bihar The state with the longest coastline - Gujarat The state having boundaries with seven states and two countries - Assam The state surrounded on three sides by Bangladesh - Tripura The state surrounded by three countries and one state - Sikkim The number of states which have a coastline - Nine The number of Union Territories which have a coastline - Four The states which have neither an international boundary nor a coastline - M.P., Chhattisgarh, Jharkhand, Haryana, Telangana 169 viewsAshish Azad, 10:28