Article Detail Which is the longest rail tunnel in India ? Answer: Pir Panjal (J&k, 11215 metre) Similar Questions : 1. Which is the Densest populated State of India ? Answer: West Bengal 2. Which is longest railway station ? Answer: Grand Central Terminal, Chicago(USA). 3. Which is the largest Mosque in India ? Answer: Jama Masjid (Delhi) 4. Which is longest tributary river of India ? Answer: Yamuna 5. Which is Longest road tunnel in the World ? Answer: Lærdal Tunnel (Norway - 24.51 kilometre) 6. What is the name of brightest star ? Answer: Sirius 7. Which is smallest planet ? Answer: Mercury Read more from - Longest and Largest