Article Detail Which is the lightest metal ? Answer: Lithium Similar Questions : 1. Which is Largest Dome in World ? Answer: St. Peter's Basilica (Rome) 2. Which is Place of heaviest rainfall ? Answer: Mausinram (Meghalaya) 3. Which is Longest national highway of India ? Answer: NH-7 ( Varanasi to Kanyakumari - 2,369 km) 4. Which is longest river of South India ? Answer: Godavari 5. Which is the Densest populated State of India ? Answer: West Bengal 6. Which is the largest Mosque in World ? Answer: Masjid al Haram (Saudi Arabia) 7. Which is Largest forest state of India ? Answer: M.P. Read more from - Longest and Largest