Article Detail Which is the lightest metal ? Answer: Lithium Similar Questions : 1. Which is the biggest museum in the world ? Answer: British Museum, London 2. Which is the highest waterfall in the world ? Answer: Angel, Venezuela 3. Which is Place of heaviest rainfall ? Answer: Mausinram (Meghalaya) 4. Which is the longest road in India ? Answer: Grand Trunk Road (2500 Km) 5. Which is the largest sea in the world ? Answer: Philippine Sea 6. Which is longest river of India Answer: Ganges 7. Which is the longest River in the World ? Answer: Nile Read more from - Longest and Largest