Article Detail Which is smallest planet ? Answer: Mercury Similar Questions : 1. Which is the longest wall in world ? Answer: Great wall of China 2. Which state is largest by Population ? Answer: Uttar Pradesh 3. Which is largest Dome in India ? Answer: Gol Gumbaz (Karnataka) 4. Which is the largest Mosque in World ? Answer: Masjid al Haram (Saudi Arabia) 5. Which is longest railway station ? Answer: Grand Central Terminal, Chicago(USA). 6. Which is Highest Battle field ? Answer: Siachin Glacier. Mastguru team Salutes to Indian soldiers. 7. Which is the Largest lake of the world ? Answer: Caspian Sea (371,000 sq km) Read more from - Longest and Largest